The conservatives want to rule man's consciousness; the liberals, his body.

For centuries, the battle of morality was fought between those who claimed that your life belongs to God and those who claimed that it belongs to your neighbors - between those who preached that the good is self-sacrifice for the sake of ghosts in heaven and those who preached that the good is self-sacrifice for the sake of incompetents on earth. And no one came to say that your life belongs to you and that the good is to live it.

If it's worth doing, it's worth overdoing.

A man's ego is the fountainhead of human progress.

Do not let your fire go out.

Nobody has ever given a reason why men should be their brother's keepers.

One can study what exists and how consciousness functions; but one cannot analyze (or “prove”) existence as such, or consciousness as such. These are irreducible primaries. (An attempt to “prove” them is self-contradict ory: it is an attempt to “prove” existence by means of nonexistence, and consciousness by means of unconsciousness .)