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April 10, 2026
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"Ancient philosophy will always hold its own among those who are worthy to judge it, because it forms... a system that is solid and well articulated like the body, whereas all these scattered members of modern philosophy form no system."
"We have now but to prove a third attribute: I mean the faculty of feeling which the philosophers of all centuries have found in this same substance. ...[T]he Cartesians have made, in vain, to rob matter of this faculty. But in order to avoid insurmountable difficulties, they have flung themselves into a labyrinth from which they have thought to escape by this absurd system "that animals are pure machines." An opinion so absurd has never gained admittance among philosophers... Experience gives us no less proof of the faculty of feeling in animals than of feeling in men."
"The Christian Scholastics... might have shown that God Himself said that He had "imprinted an active principle in the elements of matter (Gen. i; Is. lxvi)."
"[W]e must admit, with the same frankness, that we are ignorant whether matter has in itself the faculty of feeling, or only the power of acquiring it by those modifications or forms to which matter is susceptible; for it is true that this faculty of feeling appears only in organic bodies. This is then another new faculty which might exist only potentially in matter, like all the others which have been mentioned; and this was the hypothesis of the ancients, whose philosophy, full of insight and penetration, deserves to be raised above the ruins of the philosophy of the moderns."
"[E]ither everything is illusion, nature as well as revelation, or experience alone can explain faith."
"Let us... take in our hands the staff of experience... To be blind and to think that one can do without this staff is the worst kind of blindness."
"[M]an... whatever the origin of his soul, if it is pure, noble, and lofty, it is a beautiful soul which dignifies the man endowed with it."
"If there is a revelation, it can not then contradict nature."
"Lamettrie goes back to the father of the Church, Arnobius, from whose book, ' Adversus Gentes,' he borrows a hypothesis, which possibly became the original of the statue-man which plays its part in Diderot, Buffon, and particularly in Condillac. Let us suppose that in a feebly illuminated subterranean chamber, from which all sounds and sense-impressions are far removed, a new-born child is scantily nourished by a naked and ever-silent nurse... reared up without any knowledge... of the world or of human life until the age of... forty years. Then let this being leave his solitude. And now let him be asked what thoughts he has had in his solitude, and how he has been nourished and brought up. He will make no answer; he will not even know that the sound addressed to him has any meaning. Where now is that immortal particle of deity? Where is the soul that enters the body so well taught and enlightened? Like Condillac's statue, then, this creature, which has only the shape and the physical organisation of a man, must be supposed to have received feelings through the use of the senses that gradually arrange themselves, and education must do what else is necessary to give him the soul, the capacity for which is only dormant in his physical organisation. Although Cabanis, as pupil of Condillac, rightly rejected this unnatural hypothesis, we must nevertheless concede to it a certain justification as compared with the extremely weak foundation of the Cartesian doctrine of innate ideas."
"In conclusion, Lamettrie lays down the principles, " No senses, no ideas." " The fewer senses, the fewer ideas." " Little education, few ideas." " No sense-impressions, no ideas.""
"In very different fashion does the book set to work that already in its very title declares that man is a machine. While the 'Natural History of the Soul' was cautious, cunningly arranged, and only gradually surprising us with its results, here, on the contrary,the final conclusion is expressed at the outset of the work. While the 'Natural History of the Soul' allied itself with the whole Aristotelian metaphysics only in order to prove by degrees that the soul is but an empty form, into which we may pour a materialistic content, here we no longer deal in all those fine distinctions."
"These features show truly the master Of jollities, laughter and wit; Too bold he was in his nature To take off the corners of it. He would have been but for one sage The victim alas! of the fools of his age."
"There comes up another difficulty which more nearly concerns our vanity: namely, the impossibility of our conceiving this property [the faculty of feeling] as a dependence or attribute of matter."
"It is not enough for a wise man to study nature and truth; he should dare state truth for the benefit of the few who are willing and able to think."
"The ancients, persuaded that there is no body without a moving force, regarded the substance of bodies as composed of two primitive attributes. It was held that, through one of these attributes, this substance has the capacity for moving and, through the other, the capacity for being moved."
"[B]efore Descartes, some of the ancients made the essence of matter consist in solid extension. But this opinion, of which all the Cartesians have made much, has at all times been victoriously combated..."
"[I]f we demonstrate this moving principle, if we show that matter, far from being as indifferent as it is supposed to be, to movement and to rest, ought to be regarded as an active, as well as a passive substance, what resource can be left to those who have made its essence consist in extension?"
"Very ingeniously Lamettrie observes that at bottom I am immediately certain only of my own feeling. That other men also feel, I conclude with very much stronger conviction from the expression of their feelings in gestures and cries than from their articulate speech. That energetic language of the emotions is, however, the same in the animals as in men, and it carries with it much stronger proof than all the sophisms of Descartes. ...[T]he internal organisation of man and of the animals offers a perfect analogy. If it remains for the present incomprehensible how the capability of feeling can be an attribute of matter, it is with this, as with a thousand other puzzles, in which, according to an idea of Leibniz, instead of the thing itself we see only the veil that hides it. ...[S]ensation, like motion, must at all events potentially belong to all matter. So thought the ancients, whose philosophy is preferred by all capable minds to the inadequate attempts of the moderns. After this Lamettrie passes to the doctrine of substantial forms..."
"The human body is a machine which winds its own springs."
"A good prescription is still more profitable than an ."
"Descartes, a genius made to blaze new paths and to go astray in them, supposed with some other philosophers that God is the only efficient cause of motion, and that every instant He communicates motion to all bodies. But this opinion is but an hypothesis which he tried to adjust to the light of faith; and in so doing he was no longer attempting to speak as a philosopher or to philosophers. Above all he was not addressing those who can be convinced only by the force of evidence."
"I reduce to two the systems of philosophy which deal with man's soul. The first and older system is materialism; the second is spiritualism."
"The 'Natural History of the Soul' begins by showing that as yet no philosopher, from Aristotle down to Malebranche, had been able to account for the nature of the soul."
"In the year 1742 he... received there a position as surgeon to the Guard. In this capacity he made a campaign in Germany, and... was seized by a violent fever, and used this opportunity in order to institute observations upon himself as to the influence of quickened circulation upon thought. He came to the conclusion that thought is nothing but a consequence of the organisation of our mechanism. ...[H]e tried during his convalescence to explain the mental functions by the help of anatomy, and he had his conjectures printed under the title of a 'Natural History of the Soul.' The regimental chaplain sounded the alarm, and soon a universal cry of indignation was raised... His books were recognised as heretical, and he could no longer continue to be surgeon of the Guard. ...about the same time ...writing a satire on his rivals, the foremost Paris practitioners. ...He fled in the year 1746 to Leyden. Here he wrote ...a new satire upon the charlatanism and ignorance of doctors, and soon afterwards (1748) appeared also his 'Homme Machine.'"
"With regard to the questions with which we are concerned, Lamettrie stands at the commencement of the whole series."
"Hettner forgets his own chronological data when he maintains that Lamettrie, instigated chiefly by Diderot's 'Pensées Philosophiques,' wrote in 1745 the 'Histoire Naturelle de l'Ame,' and in 1748 'L'Homme Machine;' and in Schlosser's ' History of the World' we may read that Lamettrie was a very ignorant man, who had the impudence to pass off the discoveries and observations of others as his own. Only that in nearly every case where we find a striking similarity of ideas between Lamettrie and any famous contemporary of his, the former had an indisputable priority!"
"Unity of principle in the multiplicity of organisms... we find it developed with great clearness and distinctness by Lamettrie as early as the 'L'Homme Plante' in 1748. Lamettrie was led to write this treatise by Linné's just published pioneering work on the classification of plants (1747), just as we find in all his writings constant traces of the zealous following up of the newest scientific investigations. Lamettrie cites Linné; none of the later writers think it necessary to cite Lamettrie... Whoever swims with the stream of tradition and neglects the chronology, will of course represent the 'ignorant' Lamettrie as decking himself with borrowed plumes!"
"Julien Offray de la Mettrie, or simply Lamettrie... is one of the most abused, but one of the least read, authors in the history of literature—an author known even superficially to but few of those who thought proper to abuse him when it suited them."
"The soul is... but an empty word, of which no one has any idea, and which an enlightened man should use only to signify the part in us that thinks..."
"Lamettrie was not only the extremest of the French Materialists, but was the first also in point of time. ...for several decades men could with virtuous indignation condemn this sinner, while they were gradually absorbing his ideas."
"[I]n [Lamettrie's] ' Natural History of the Soul,' the Materialism is covered only by a very transparent veil. In the same work we find an idea which in all probability afforded the suggestion for Condillac's sensitive statue [ Traité des sensations]."
"Whatever the virtue may be, from whatever source it may come, it is worthy of esteem... Mind, beauty, wealth, nobility, although the children of chance, all have their own value, as skill, learning and virtue have theirs."
"Man's preeminent advantage is his organism. ...Only through nature do we have any good qualities; to her we owe all that we are."
"If one's organism is... the preeminent advantage, and the source of all others, education is the second. The best made brain would be a total loss without it..."
"[W]hy should we divide the sensitive principle which thinks in man? ...For a thing that is divided can no longer without absurdity be regarded as indivisible."
"[E]verything is the work of imagination, and... all the faculties of the soul can be correctly reduced to pure imagination..."
"[I]magination is the soul, since it plays all the roles of the soul."
"[H]e who has the most imagination should be regarded as having the most intelligence or genius, for all these words are synonymous..."
"That the true connection could so long be misrepresented is, next to the influence of Hegel and his school, chiefly to be attributed to the resentment excited by Lamettrie's attack upon the Christian morality. People forgot, in consequence, his theoretical writings; and the calmest and most serious of them, including the 'Natural History of the Soul,' were most completely forgotten."
"Man has been trained in the same way as animals. He has become an author, as they became beasts of burden."
"What was man before the invention of words and the knowledge of language? An animal.."
"A geometrician has learned to perform the most difficult demonstrations and calculations, as a monkey has learned to take his little hat off and on..."
"Among animals, some learn to speak and sing; they remember tunes, and strike the notes as exactly as a musician. Others, for instance the ape, show more intelligence... would it be absolutely impossible to teach the ape a language? I do not think so."
"A mere nothing, a tiny fibre, something that could never be found by the most delicate anatomy, would have made of Erasmus and Fontenelle two idiots, and Fontenelle himself speaks of this very fact in one of his best dialogues."
"Let us not limit the resources of nature; they are infinite, especially when reinforced by great art."
"As a violin string or a harpsichord key vibrates and gives forth sound, so the cerebral fibres, struck by waves of sound, are stimulated to render or repeat the words that strike them."
"[A] brilliant man is his own best company, unless he can find other company of the same sort."
"The mind, like the body, has its contagious diseases and its scurvy. ...[W]e catch everything from those with whom we come in contact; their gestures, their accent, etc."
"Write as if thou wert alone in the universe and hadst nothing to fear from the jealousies and prejudices of the people. Otherwise thou wilt miss thy purpose."
"[T]he, diverse states of the soul are always correlative with those of the body."