Happiness is an abstraction, it is a product of the imagination, it is a way of being moved, which depends entirely on our way of seeing and feeling.

All, all is theft, all is unceasing and rigorous competition in nature; the desire to make off with the substance of others is the foremost - the most legitimate - passion nature has bred into us and, without doubt, the most agreeable one.

Virtue can procure only an imaginary happiness; true felicity lies only in the senses, and virtue gratifies none of them.

Man's natural character is to imitate; that of the sensitive man is to resemble as closely as possible the person whom he loves. It is only by imitating the vices of others that I have earned my misfortunes.

You say that my way of thinking cannot be tolerated? What of it? The man who alters his way of thinking to suit othere is a fool. My way of thinking is the result of my reflections. It is part of my inner being,the way I am made. I do not contradict them, and would not even if I wished to. For my system, which you disapprove of is also my greatest comfort in life, the source of all my happiness -it means more to me than my life itself.

What does one want when one is engaged in the sexual act? That everything around you give you its utter attention, think only of you, care only for you...every man wants to be a tyrant when he fornicates.

Anything beyond the limits and grasp of the human mind is either illusion or futility; and because your god having to be one or the other of the two, in the first instance I should be mad to believe in him, and in the second a fool.