"Let us observe the ape, the beaver, the elephant, etc., in their operations. If it is clear that these activities can not be performed without intelligence, why refuse intelligence to these animals?"
Man a Machine is a work of materialist philosophy by the 18th-century French physician and philosopher Julien Offray de La Mettrie, first published in 1747. In this work, de La Mettrie extends Descartes' argument that animals are mere automatons, or machines, to human beings. He denies dualism and the existence of the soul as a substance separate from matter.
"[I]t does not matter for our peace of mind, whether matter be eternal or have been created, whether there be or be not a God. How foolish to torment ourselves so much about things which we can not know, and which would not make us any happier even were we to gain knowledge about them!"
Man a Machine"I should prefer an intelligent man without an education, if he were still young enough, to a man badly educated. A badly trained mind is like an actor whom the provinces have spoiled."
Man a Machine"[T]here is so much pleasure in doing good, in recognizing and appreciating what one receives, so much satisfaction in practising virtue, in being gentle, humane, kind, charitable, compassionate and generous (for this one word includes all the virtues), that I consider as sufficiently punished any one who is unfortunate enough not to have been born virtuous."
Man a Machine"[M]an, even though he should come from an apparently still more lowly source, would yet be the most perfect of all beings, so 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."
Man a Machine"The soul and the body fall asleep together. ...the soul can no longer bear the burden of thought; it is in sleep as if it were not."
Man a Machine"Man is so complicated a machine that it is impossible to get a clear idea of the machine beforehand, and hence impossible to define it. For this reason, all the investigations have been vain, which the greatest philosophers have made à priori, that is to say, in so far as they use, as it were, the wings of the spirit. Thus it is only à posteriori or by trying to disentangle the soul from the organs of the body, so to speak, that one can reach the highest probability concerning mans own nature, even though one can not discover with certainty what his nature is."
Man a Machine