What is this world? A complex whole, subject to endless revolutions. All these revolutions show a continual tendency to destruction; a swift succession of beings who follow one another, press forward, and vanish; a fleeting symmetry; the order of a moment. I reproached you just now with estimating the perfection of things by your own capacity; and I might accuse you here of measuring its duration by the length of your own days.

I picture the vast realm of the sciences as an immense landscape scattered with patches of dark and light. The goal towards which we must work is either to extend the boundaries of the patches of light, or to increase their number. One of these tasks falls to the creative genius; the other requires a sort of sagacity combined with perfectionism.

The bad gives rise to the good, the good inspires the better, the better produces the excellent, the excellent is followed by the bizarre

If your little savage were left to himself and be allowed to retain all his ignorance, he would in time join the infant's reasoning to the grown man's passion, he would strangle his father and sleep with his mother.

The fact is that she was terribly undressed and I was extremely undressed too. The fact is that I still had my hand where she didn't have anything and she had hers where the same wasn't quite true of me. The fact is that I found myself underneath her and consequently she found herself on top of me.

Those authors into whose hands nature has placed a magic wand, with which they no sooner touch us than we forget the unhappiness in life, than the darkness leaves our soul, and we are reconciled to existence, should be placed among the benefactors of the human race.

A thing is not proved just because no one has ever questioned it. What has never been gone into impartially has never been properly gone into. Hence scepticism is the first step toward truth. It must be applied generally, because it is the touchstone.