“The following general definition of an animal: a system of different organic molecules that have combined with one another, under the impulsion of a sensation similar to an obtuse and muffled sense of touch given to them by the creator of matter as a whole, until each one of them has found the most suitable position for it shape and comfort.”

—  Denis Diderot

No. 51
On the Interpretation of Nature (1753)

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Denis Diderot106
French Enlightenment philosopher and encyclopædist 1713–1784

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Original: (fr) On dirait que le végétal est l'ébauche, le canevas de l'animal, et que, pour former ce dernier, il n'a fallu que revêtir ce canevas d'un appareil d'organes extérieurs, propres à établir des relations. Il résulte de là que les fonctions de l'animal forment deux classes très-distinctes. Les unes se composent d'une succession habituelle d'assimilation et d'excrétion ; par elles il transforme sans cesse en sa propre substance les molécules des corps voisins, et rejette ensuite ces molécules, lorsqu'elles lui sont devenues hétérogènes. Il ne vit qu'en lui, par cette classe de fonctions ; par l'autre il existe hors de lui : il est l'habitant du monde, et non, comme le végétal, du lieu qui le vit naître. Il sent et aperçoit ce qui l'entoure, réfléchit ses sensations, se meut volontairement d'après leur influenc, et le plus souvent peut communiquer par la voix, ses désirs et ses craintes, ses plaisirs ou ses peines. J'appelle vie organique l'ensemble des fonctions de la première classe, parce que tous les êtres organisés, végétaux ou animaux, en jouissent à un degré plus ou moins marqué, et que la texture organique est la seule condition nécessaire à son exercice. Les fonctions réunies de la seconde classe forment la vie animale, ainsi nommée, parce qu'elle est l'attribut exclusif du règne animal. Recherches Physiologiques sur la Vie et la Mort (1800) Translation: [Russell, E. S., Form and Function: A Contribution to the History of Animal Morphology, 1916, London, 28,

https://archive.org/details/formfunctioncont00russ/page/n5/mode/2up]

Ref: en.wikiquote.org - Xavier Bichat / Quotes

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