To sell your soul is the easiest thing in the world. That's what everybody does every hour of his life. If I asked you to keep your soul - would you understand why that's much harder?

Since reason is man’s basic means of survival, that which is proper to the life of a rational being is the good; that which negates, opposes or destroys it is the evil.

People think that a liar gains a victory over his victim. What I’ve learned is that a lie is an act of self-abdication, because one surrenders one’s reality to the person to whom one lies, making that person one’s master, condemning oneself from then on to faking the sort of reality that person’s view requires to be faked…The man who lies to the world, is the world’s slave from then on…There are no white lies, there is only the blackest of destruction, and a white lie is the blackest of all.

One of the most destructive anti-concepts in the history of moral philosophy is the term 'duty.

The meaning ascribed in popular usage to the word 'selfishness' is not merely wrong: it represents a devastating intellectual 'package-deal,' which is responsible, more than any other single factor, for the arrested moral development of mankind.

A mystic is a man who treats his feelings as tools of cognition.

It was the greatest sensation of existence: not to trust but to know.