Happiness is ideal, it is the work of the imagination.

It has, moreover, been proven that horror, nastiness, and the frightful are what give pleasure when one fornicates. Beauty is a simple thing; ugliness is the exceptional thing. And fiery imaginations, no doubt, always prefer the extraordinary thing to the simple thing.

Crime is to the passions what nervous fluid is to life: it sustains them, it supplies their strength.

At all times, in every century, every age, there has been such a connection between despotism and religion that it is infinitely apparent and demonstrated a thousand times over, that in destroying one, the other must be undermined, for the simple reason that the first will always put the law into the service of the second.

For mortal men there is but one hell, and that is the folly and wickedness and spite of his fellows; but once his life is over, there's an end to it: his annihilation is final and entire, of him nothing survives.

My manner of thinking, so you say, cannot be approved. Do you suppose I care? A poor fool indeed is he who adopts a manner of thinking to suit other people! My manner of thinking stems straight from my considered reflections; it holds with my existence, with the way I am made. It is not in my power to alter it; and were it, I'd not do so.

Get it into your head once and for all, my simple and very fainthearted fellow, that what fools call humanness is nothing but a weakness born of fear and egoism; that this chimerical virtue, enslaving only weak men, is unknown to those whose character is formed by stoicism, courage, and philosophy.