Add heat to it, keep it in an oven, and let the operation continue of itself, and we have a chicken, that is to say, "sensibility, life, memory, conscience, passions and thought." That which you call soul is the nervous center in which all sensitive chords concentrate. Their vibrations produce sensations; a quickened or reviving sensation is memory; our ideas are the result of sensations, memory and signs. Matter, accordingly, is not the work of an intelligence, but matter, through its own arrangement, produces intelligence. Let us fix intelligence where it is, in the organized body; we must not detach it from its support to perch it in the sky on an imaginary throne. This disproportionate conception, once introduced into our minds, ends in perverting the natural play of our sentiments, and, like a monstrous parasite, abstracts for itself all our substance.[3315] The first interest of a sane person is to get rid of it, to discard every superstition, every "fear of invisible powers."[3316]--Then only can he establish a moral order of things and distinguish "the natural law." The sky consisting of empty space, we have no need to seek commands from on high. Let us look down to the ground; let us consider man in himself, as he appears in the eyes of the naturalist, namely, an organized body, a sensitive animal possessing wants, appetites and instincts. Not only are these indestructible but they are legitimate. Let us throw open the prison in which prejudice confines them; let us give them free air and space; let them be displayed in all their strength and all will go well. According to Diderot,[3317] a lasting marriage is an abuse, being "the tyranny of a man who has converted the possession of a woman into property." Purity is an invention and conventional, like a dress;[3318] happiness and morals go together only in countries where instinct is sanctioned; as in Tahiti, for instance, where marriage lasts but a month, often only a day, and sometimes a quarter of an hour, where, in the evening and with hospitable intent, a host offers his daughters and wife to his guests, where the son espouses his mother out of politeness, where the union of the sexes is a religious festivity celebrated in public.--And, pushing things to extremes, the logician ends with five or six pages calculated "to make one's hair stand on end,"[3319] himself avowing that his doctrine is "neither suited for children nor for adults."--With Diderot, to say the least, these paradoxes have their correctives. In his pictures of modern ways and habits, he is the moralist. He not only is familiar with all the chords of the human keyboard, but he classifies each according to its rank. He loves fine and pure tones, and is full of enthusiasm for noble harmonies; his heart is equal to his genius.[3320] And better still, on the question of primitive impulses arising, he assigns, side by side with vanity, an independent and superior position to pity, friendship, kindness and