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Robert Grosseteste & the Medieval Light Fantastic. | Jack Cunningham | TEDxBrayfordPool


[Music]

[Music] you

I want to talk about Robert gross test

I want to talk about Robert gross test who and what I feel is not only the one

who and what I feel is not only the one

who and what I feel is not only the one of the most impressive people to come

of the most impressive people to come

of the most impressive people to come from this city but there’s also probably

from this city but there’s also probably

from this city but there’s also probably the one the most overlooked as well but

the one the most overlooked as well but

the one the most overlooked as well but just to set the scene he is in a

just to set the scene he is in a

just to set the scene he is in a thirteenth century bishop and if there

thirteenth century bishop and if there

thirteenth century bishop and if there is one term that is most Mis applied to

is one term that is most Mis applied to

is one term that is most Mis applied to the Middle Ages it is it is the Dark

the Middle Ages it is it is the Dark

the Middle Ages it is it is the Dark Ages it is a time of great superstition

Ages it is a time of great superstition

Ages it is a time of great superstition people thought the world was flat and

people thought the world was flat and

people thought the world was flat and the sky was going to fall on their heads

the sky was going to fall on their heads

the sky was going to fall on their heads and the eked out a miserable existence

and the eked out a miserable existence

and the eked out a miserable existence saved only now and again by the

saved only now and again by the

saved only now and again by the superstitions that they clung to and I

superstitions that they clung to and I

superstitions that they clung to and I want to challenge that that that

want to challenge that that that

want to challenge that that that caricature of the Middle Ages and I want

caricature of the Middle Ages and I want

caricature of the Middle Ages and I want to do it by exploring Robert Krauss test

to do it by exploring Robert Krauss test

to do it by exploring Robert Krauss test because and in this 13th century bishop

because and in this 13th century bishop

because and in this 13th century bishop and this philosopher this theologian

and this philosopher this theologian

and this philosopher this theologian this poet we also find remarkably in the

this poet we also find remarkably in the

this poet we also find remarkably in the Middle Ages first-class scientist and

Middle Ages first-class scientist and

Middle Ages first-class scientist and that is something I think which is

that is something I think which is

that is something I think which is rather remarkable and it challenges and

rather remarkable and it challenges and

rather remarkable and it challenges and misconceptions I think that we generally

misconceptions I think that we generally

misconceptions I think that we generally have and are still so persistent to this

have and are still so persistent to this

have and are still so persistent to this day robert cross test let me start at

day robert cross test let me start at

day robert cross test let me start at the beginning the chronicles tell us

the beginning the chronicles tell us

the beginning the chronicles tell us this and sir it’s got a ring of legend

this and sir it’s got a ring of legend

this and sir it’s got a ring of legend about it this story but that does not

about it this story but that does not

about it this story but that does not mean to say that it isn’t true we are

mean to say that it isn’t true we are

mean to say that it isn’t true we are told that at the age of nine years old

told that at the age of nine years old

told that at the age of nine years old he is sent off from suffolk by his

he is sent off from suffolk by his

he is sent off from suffolk by his mother and go seek and education and

mother and go seek and education and

mother and go seek and education and there are no universities so where’d you

there are no universities so where’d you

there are no universities so where’d you go to seek an education you go to the

go to seek an education you go to the

go to seek an education you go to the Cathedral and he sets off for Lincoln

Cathedral and he sets off for Lincoln

Cathedral and he sets off for Lincoln but before he does his mother gives him

but before he does his mother gives him

but before he does his mother gives him a pearl of wisdom which is going to

a pearl of wisdom which is going to

a pearl of wisdom which is going to serve him well in his life and she tells

serve him well in his life and she tells

serve him well in his life and she tells him to always value the food the mind

him to always value the food the mind

him to always value the food the mind o-over the food of the belly and with

o-over the food of the belly and with

o-over the food of the belly and with this in his head he heads off towards a

this in his head he heads off towards a

this in his head he heads off towards a Lincoln to the great seat of learning

Lincoln to the great seat of learning

Lincoln to the great seat of learning which is Lincoln Cathedral as he arrives

which is Lincoln Cathedral as he arrives

which is Lincoln Cathedral as he arrives there he notices the first big house at

there he notices the first big house at

there he notices the first big house at first wealthy house and this happens to

first wealthy house and this happens to

first wealthy house and this happens to be the house of the new mayor of Lincoln

be the house of the new mayor of Lincoln

be the house of the new mayor of Lincoln and he knocks on the door looking for

and he knocks on the door looking for

and he knocks on the door looking for assistance

assistance

assistance and the mayor opens the door we are told

and the mayor opens the door we are told

and the mayor opens the door we are told and takes one look at this urgent in

and takes one look at this urgent in

and takes one look at this urgent in front of them and he says to him you can

front of them and he says to him you can

front of them and he says to him you can have this cape on this roasted chicken

have this cape on this roasted chicken

have this cape on this roasted chicken you can have it now but you make me warm

you can have it now but you make me warm

you can have it now but you make me warm promise you will never become the Bishop

promise you will never become the Bishop

promise you will never become the Bishop of Lincoln and we are told that Robert

of Lincoln and we are told that Robert

of Lincoln and we are told that Robert cross test remembering the words of

cross test remembering the words of

cross test remembering the words of wisdom from his mother says I refuse and

wisdom from his mother says I refuse and

wisdom from his mother says I refuse and walks away and now the mayor is so

walks away and now the mayor is so

walks away and now the mayor is so impressed that he calls him back and

impressed that he calls him back and

impressed that he calls him back and says you were looking for help and he

says you were looking for help and he

says you were looking for help and he said I was looking for assistance in

said I was looking for assistance in

said I was looking for assistance in education not in eating and they wear is

education not in eating and they wear is

education not in eating and they wear is so impressed by this that he pays for

so impressed by this that he pays for

so impressed by this that he pays for his education in Lincoln Cathedral and

his education in Lincoln Cathedral and

his education in Lincoln Cathedral and if that’s Chronicle is true and it may

if that’s Chronicle is true and it may

if that’s Chronicle is true and it may be then that is what mayor is

be then that is what mayor is

be then that is what mayor is responsible for the beginning of a truly

responsible for the beginning of a truly

responsible for the beginning of a truly spectacular academic career well what’s

spectacular academic career well what’s

spectacular academic career well what’s so special about Robert Gross test well

so special about Robert Gross test well

so special about Robert Gross test well he has been described as the first

he has been described as the first

he has been described as the first modern scientist huge claimed the first

modern scientist huge claimed the first

modern scientist huge claimed the first modern scientist in the 13th century and

modern scientist in the 13th century and

modern scientist in the 13th century and why was that well it’s because of a

why was that well it’s because of a

why was that well it’s because of a deceptively simple idea he has and the

deceptively simple idea he has and the

deceptively simple idea he has and the idea is this that in order to learn

idea is this that in order to learn

idea is this that in order to learn stuff we observe we look you look at

stuff we observe we look you look at

stuff we observe we look you look at stuff in order to learn stuff and this

stuff in order to learn stuff and this

stuff in order to learn stuff and this is deceptively simple but it hasn’t been

is deceptively simple but it hasn’t been

is deceptively simple but it hasn’t been round as an idea since the Greeks people

round as an idea since the Greeks people

round as an idea since the Greeks people looked at stuff before I read them a

looked at stuff before I read them a

looked at stuff before I read them a beautiful account before which is highly

beautiful account before which is highly

beautiful account before which is highly typical of how they observed things

typical of how they observed things

typical of how they observed things before you look at things in nature in

before you look at things in nature in

before you look at things in nature in order to find out theological truths so

order to find out theological truths so

order to find out theological truths so there is a wonderful guy called gerald

there is a wonderful guy called gerald

there is a wonderful guy called gerald of wales who’s walking around ireland

of wales who’s walking around ireland

of wales who’s walking around ireland and observing things and learning from

and observing things and learning from

and observing things and learning from nature and he watches an osprey swimming

nature and he watches an osprey swimming

nature and he watches an osprey swimming into gliding into the water I’m picking

into gliding into the water I’m picking

into gliding into the water I’m picking up a fish and what does he learn from

up a fish and what does he learn from

up a fish and what does he learn from this he learns that this is how God

this he learns that this is how God

this he learns that this is how God captures Christian souls that’s what you

captures Christian souls that’s what you

captures Christian souls that’s what you learn from nature well bob lagrosse test

learn from nature well bob lagrosse test

learn from nature well bob lagrosse test was inclined to make similar conclusions

was inclined to make similar conclusions

was inclined to make similar conclusions sometimes but crucially he did this also

sometimes but crucially he did this also

sometimes but crucially he did this also he looked at nature he looked at what

he looked at nature he looked at what

he looked at nature he looked at what was happening he described it and he

was happening he described it and he

was happening he described it and he attempted to draw laws from it he is the

attempted to draw laws from it he is the

attempted to draw laws from it he is the first person in the world to know how

first person in the world to know how

first person in the world to know how the rainbow works and he does it by

the rainbow works and he does it by

the rainbow works and he does it by looking at rainbows he looks at them in

looking at rainbows he looks at them in

looking at rainbows he looks at them in water wheels he blows water out of his

water wheels he blows water out of his

water wheels he blows water out of his mouth into light to create rainbows and

mouth into light to create rainbows and

mouth into light to create rainbows and he looks at them in the sky and from

he looks at them in the sky and from

he looks at them in the sky and from that he makes deductions and once you

that he makes deductions and once you

that he makes deductions and once you make deductions from something you can

make deductions from something you can

make deductions from something you can apply them to other things so he looks

apply them to other things so he looks

apply them to other things so he looks at a prison he who works in optics and

at a prison he who works in optics and

at a prison he who works in optics and he looks at a prison creating the

he looks at a prison creating the

he looks at a prison creating the rainbow and he sees that it is created

rainbow and he sees that it is created

rainbow and he sees that it is created by light and translucent objects and he

by light and translucent objects and he

by light and translucent objects and he says he he says that this is something

says he he says that this is something

says he he says that this is something we can maybe now apply to other rainbows

we can maybe now apply to other rainbows

we can maybe now apply to other rainbows but then he looks at a rainbow in a

but then he looks at a rainbow in a

but then he looks at a rainbow in a ducts better and it is not caused by

ducts better and it is not caused by

ducts better and it is not caused by refraction he’s got this word refraction

refraction he’s got this word refraction

refraction he’s got this word refraction nobody’s ever described a rainbow like

nobody’s ever described a rainbow like

nobody’s ever described a rainbow like this before

this before

this before it’s refracted light and he looks the

it’s refracted light and he looks the

it’s refracted light and he looks the rainbow in there ducts feather and it’s

rainbow in there ducts feather and it’s

rainbow in there ducts feather and it’s not reflection that’s reflection but

not reflection that’s reflection but

not reflection that’s reflection but when I look at the rainbow in my prism

when I look at the rainbow in my prism

when I look at the rainbow in my prism in my studio and then look at the

in my studio and then look at the

in my studio and then look at the rainbow in the sky the same law applies

rainbow in the sky the same law applies

rainbow in the sky the same law applies after doctors from that how light is

after doctors from that how light is

after doctors from that how light is broken up and the same thing applies

broken up and the same thing applies

broken up and the same thing applies because this is a law and it applies

because this is a law and it applies

because this is a law and it applies down here and it applies up there and

down here and it applies up there and

down here and it applies up there and that rainbow up there is caused by

that rainbow up there is caused by

that rainbow up there is caused by refraction this is revolutionary this is

refraction this is revolutionary this is

refraction this is revolutionary this is revolutionary thought he also does

revolutionary thought he also does

revolutionary thought he also does something which is incredibly important

something which is incredibly important

something which is incredibly important I’m no understanding of how this has

I’m no understanding of how this has

I’m no understanding of how this has been brushed out of the history of

been brushed out of the history of

been brushed out of the history of science so consistently he says this all

science so consistently he says this all

science so consistently he says this all reality in our universe can be expressed

reality in our universe can be expressed

reality in our universe can be expressed in lines figures and angles in other

in lines figures and angles in other

in lines figures and angles in other words mathematics this is geometry and

words mathematics this is geometry and

words mathematics this is geometry and this is revolutionary as well because if

this is revolutionary as well because if

this is revolutionary as well because if you work out a mathematical law by

you work out a mathematical law by

you work out a mathematical law by observing something mathematics is

observing something mathematics is

observing something mathematics is universally true so how light behaves in

universally true so how light behaves in

universally true so how light behaves in in a what area of water in your in your

in a what area of water in your in your

in a what area of water in your in your room is exactly mathematically how light

room is exactly mathematically how light

room is exactly mathematically how light will behave everywhere in the universe

will behave everywhere in the universe

will behave everywhere in the universe and he can start working out universal

and he can start working out universal

and he can start working out universal laws now using geometry and that is

laws now using geometry and that is

laws now using geometry and that is incredibly important another reason why

incredibly important another reason why

incredibly important another reason why he is important I had nice pictures of

he is important I had nice pictures of

he is important I had nice pictures of rainbows and I forgot to show you them

rainbows and I forgot to show you them

rainbows and I forgot to show you them getting carried away inter with myself

getting carried away inter with myself

getting carried away inter with myself here’s his rainbows and that’s him lying

here’s his rainbows and that’s him lying

here’s his rainbows and that’s him lying on his back

on his back

on his back working water and you can’t quite see

working water and you can’t quite see

working water and you can’t quite see him in the picture but that’s a that’s

him in the picture but that’s a that’s

him in the picture but that’s a that’s what he’s doing there okay

what he’s doing there okay

what he’s doing there okay rainbows are caused by a refraction

rainbows are caused by a refraction

rainbows are caused by a refraction thanks to Robert cross test I campaign

thanks to Robert cross test I campaign

thanks to Robert cross test I campaign wants to have a statue of him in Lincoln

wants to have a statue of him in Lincoln

wants to have a statue of him in Lincoln for all different reasons but if he’d

for all different reasons but if he’d

for all different reasons but if he’d just done that he just laid on his back

just done that he just laid on his back

just done that he just laid on his back in the park I made her aim bows he

in the park I made her aim bows he

in the park I made her aim bows he should have a statue in this city okay

should have a statue in this city okay

should have a statue in this city okay there is another reason why he is great

there is another reason why he is great

there is another reason why he is great and it is this he is alike alike many

and it is this he is alike alike many

and it is this he is alike alike many scholars of him of his generation the

scholars of him of his generation the

scholars of him of his generation the first to say that there are no frontiers

first to say that there are no frontiers

first to say that there are no frontiers to knowledge knowledge is not the

to knowledge knowledge is not the

to knowledge knowledge is not the monopoly of a group of people in this

monopoly of a group of people in this

monopoly of a group of people in this case European Christians other people

case European Christians other people

case European Christians other people have been vouchsafed truths that’s also

have been vouchsafed truths that’s also

have been vouchsafed truths that’s also pretty spectacular and when he is

pretty spectacular and when he is

pretty spectacular and when he is working on the rainbow he’s not only

working on the rainbow he’s not only

working on the rainbow he’s not only looking at things but he’s got a text in

looking at things but he’s got a text in

looking at things but he’s got a text in his hand and that text comes from a

his hand and that text comes from a

his hand and that text comes from a heretic it comes from Arab genius called

heretic it comes from Arab genius called

heretic it comes from Arab genius called al Kindi

al Kindi

al Kindi who wrote in a tract called the burning

who wrote in a tract called the burning

who wrote in a tract called the burning glass about refraction and this is where

glass about refraction and this is where

glass about refraction and this is where Robert Krauss test is getting his

Robert Krauss test is getting his

Robert Krauss test is getting his knowledge from he’s peeking over the

knowledge from he’s peeking over the

knowledge from he’s peeking over the boundaries that Christian Europe has set

boundaries that Christian Europe has set

boundaries that Christian Europe has set itself which says for further from here

itself which says for further from here

itself which says for further from here there is no knowledge and understanding

there is no knowledge and understanding

there is no knowledge and understanding and he’s peeking at that and seeing that

and he’s peeking at that and seeing that

and he’s peeking at that and seeing that there is and he’s using it and this is

there is and he’s using it and this is

there is and he’s using it and this is wonderful stuff he’s using it with

wonderful stuff he’s using it with

wonderful stuff he’s using it with Jewish scholars he’s using it with Arab

Jewish scholars he’s using it with Arab

Jewish scholars he’s using it with Arab scholars the greatest scientists in

scholars the greatest scientists in

scholars the greatest scientists in Europe and in the world sorry at this

Europe and in the world sorry at this

Europe and in the world sorry at this time and he is also using it with a

time and he is also using it with a

time and he is also using it with a pagan scholars chief of all chief of all

pagan scholars chief of all chief of all

pagan scholars chief of all chief of all this great man Aristotle Aristotle who

this great man Aristotle Aristotle who

this great man Aristotle Aristotle who was banned in Europe at the beginning of

was banned in Europe at the beginning of

was banned in Europe at the beginning of the 13th centuries just arriving up from

the 13th centuries just arriving up from

the 13th centuries just arriving up from Muslim Spain and he’s banned because

Muslim Spain and he’s banned because

Muslim Spain and he’s banned because he’s saying something very very radical

he’s saying something very very radical

he’s saying something very very radical he saying you should use your senses to

he saying you should use your senses to

he saying you should use your senses to learn and this is of course heretical

learn and this is of course heretical

learn and this is of course heretical because we all know since Adam and Eve

because we all know since Adam and Eve

because we all know since Adam and Eve that we cannot use your senses we’re

that we cannot use your senses we’re

that we cannot use your senses we’re fooled creature fallen creatures and we

fooled creature fallen creatures and we

fooled creature fallen creatures and we can’t trust our senses we must use that

can’t trust our senses we must use that

can’t trust our senses we must use that have great books and great learning and

have great books and great learning and

have great books and great learning and above all the Bible and Aristotle is

above all the Bible and Aristotle is

above all the Bible and Aristotle is saying look and listen and use your

saying look and listen and use your

saying look and listen and use your senses Robert gracias makes him

senses Robert gracias makes him

senses Robert gracias makes him palatable – up – are you

palatable – up – are you

palatable – up – are you in audience and this is how he does it

in audience and this is how he does it

in audience and this is how he does it this is an incredible achievement I’m

this is an incredible achievement I’m

this is an incredible achievement I’m going about this in a very roundabout

going about this in a very roundabout

going about this in a very roundabout way but just bear with me for a second

way but just bear with me for a second

way but just bear with me for a second this is his very short treatise called

this is his very short treatise called

this is his very short treatise called there Luce concerning light and in this

there Luce concerning light and in this

there Luce concerning light and in this he says that at the beginning of the of

he says that at the beginning of the of

he says that at the beginning of the of these the creation of the universe we

these the creation of the universe we

these the creation of the universe we read this in Genesis God

read this in Genesis God

read this in Genesis God otters two words the first words spoken

otters two words the first words spoken

otters two words the first words spoken in the history of the cosmos he says he

in the history of the cosmos he says he

in the history of the cosmos he says he says fiat looks let there be light and

says fiat looks let there be light and

says fiat looks let there be light and at that moment there was light and light

at that moment there was light and light

at that moment there was light and light struck a part of our universe were there

struck a part of our universe were there

struck a part of our universe were there was matter but the matter was innate

was matter but the matter was innate

was matter but the matter was innate they didn’t have dimension and it didn’t

they didn’t have dimension and it didn’t

they didn’t have dimension and it didn’t exist in time it was innate and when

exist in time it was innate and when

exist in time it was innate and when light hits it costs Gloucester says it

light hits it costs Gloucester says it

light hits it costs Gloucester says it gives it corporality so now this matter

gives it corporality so now this matter

gives it corporality so now this matter exists in time and space but process is

exists in time and space but process is

exists in time and space but process is an observer and he who also watches how

an observer and he who also watches how

an observer and he who also watches how light behaves and when he is Litton is

light behaves and when he is Litton is

light behaves and when he is Litton is when his lit a lamp in his study he

when his lit a lamp in his study he

when his lit a lamp in his study he knows instantly that light fills his

knows instantly that light fills his

knows instantly that light fills his workshop because the light has a unique

workshop because the light has a unique

workshop because the light has a unique property in nature it can replicate

property in nature it can replicate

property in nature it can replicate itself at the speed he says of infinity

itself at the speed he says of infinity

itself at the speed he says of infinity or as we would say at the speed of light

or as we would say at the speed of light

or as we would say at the speed of light this happens and as it happens

this happens and as it happens

this happens and as it happens light drags matter with it all over the

light drags matter with it all over the

light drags matter with it all over the universe

universe

universe creating the planets the Stars the black

creating the planets the Stars the black

creating the planets the Stars the black holes and the solar systems this happens

holes and the solar systems this happens

holes and the solar systems this happens the first moment of creation highly

the first moment of creation highly

the first moment of creation highly sophisticated understanding of how our

sophisticated understanding of how our

sophisticated understanding of how our universe began and here is a lovely

universe began and here is a lovely

universe began and here is a lovely thing it doesn’t just stop there it

thing it doesn’t just stop there it

thing it doesn’t just stop there it doesn’t just stop there because what

doesn’t just stop there because what

doesn’t just stop there because what applies to the universe applies to your

applies to the universe applies to your

applies to the universe applies to your mind as well and in your mind you have

mind as well and in your mind you have

mind as well and in your mind you have knowledge and learning now observation

knowledge and learning now observation

knowledge and learning now observation is only the basis of that knowledge

is only the basis of that knowledge

is only the basis of that knowledge something wonderful is going to happen

something wonderful is going to happen

something wonderful is going to happen later on because when you prepared your

later on because when you prepared your

later on because when you prepared your mind with this observation and with this

mind with this observation and with this

mind with this observation and with this learning a thing happens called solar

learning a thing happens called solar

learning a thing happens called solar tear and at that moment an idea hits

tear and at that moment an idea hits

tear and at that moment an idea hits your head like God sending a lightning

your head like God sending a lightning

your head like God sending a lightning bolt to create the universe and as it

bolt to create the universe and as it

bolt to create the universe and as it hits your head you are filled with a

hits your head you are filled with a

hits your head you are filled with a wonderful idea you get it you know as

wonderful idea you get it you know as

wonderful idea you get it you know as you understand and that is solar tear

you understand and that is solar tear

you understand and that is solar tear it’s akin to the Big Bang

it’s akin to the Big Bang

it’s akin to the Big Bang it’s akin to the creation of the

it’s akin to the creation of the

it’s akin to the creation of the universe so I want to just finish saying

universe so I want to just finish saying

universe so I want to just finish saying this robert cross test deserves credit

this robert cross test deserves credit

this robert cross test deserves credit he deserves credit for for for for for

he deserves credit for for for for for

he deserves credit for for for for for showing us that all reality in this

showing us that all reality in this

showing us that all reality in this universe whether it’s our own bright

universe whether it’s our own bright

universe whether it’s our own bright ideas all the creation of the universe

ideas all the creation of the universe

ideas all the creation of the universe are underpinned by this wonderful

are underpinned by this wonderful

are underpinned by this wonderful phenomena the light fantastic and he has

phenomena the light fantastic and he has

phenomena the light fantastic and he has deserves credit also for this for firing

deserves credit also for this for firing

deserves credit also for this for firing great bolts of his own luminosity into

great bolts of his own luminosity into

great bolts of his own luminosity into an age which was far from the dark ages

an age which was far from the dark ages

an age which was far from the dark ages [Applause]

”

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