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The experiment of the change of aspect is similar to an action. It is to pay attention.
Which is the criterion of the experiment of seeing ? The representation of what is to be seen.
Can I separate what is seen of what is thought ?
Again, it is to see in accordance with a significance. To see like.
The word is an image of what it means ; a sentence can seem to me like a painting by words.
Ludwig Wittgenstein

Look at attentively because what you will see is not any more what you have just seen.
Léonard de Vinci

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ICONOPEE : drawing and understanding
"Iconopée" is the expression used by Jacques Lordat -Dean of the Faculty of Medicine of Montpellier from 1819 to 1830 - to name the action to form an image. The picturesque representations of arts and sciences exceed the simple observation with the naked eye, they express the will to understand "the spectacle of nature", they are images manufactured to expose what one has understood. Drawing was essential in the XVIII° century to validate any description of a new kind. Some exemplary cases show the richness of the representations of living world and universes, true witnesses of the evolution of knowledge.