The highest ethical duty is often to discard the outmoded ethics of the past.

Overemphasis on the sex aspect of morality has led to a neglect of its other aspects and a narrowing of its range.

The intuition of free will gives us the truth.

Humanism involves far more than the negation of supernaturalism. It requires an affirmative philosophy . . . translated into a life devoted to one's own improvement and the service of all mankind.

The cause-effect sequences in our brains are just as determining, just as inescapable, as anywhere else in Nature.

Most men, I am convinced, have an unmistakable feeling at the final moment of significant choice that they are making a free decision, that they can really decide which one of two or more roads to follow.

I believe firmly that in making ethical decisions, man has the prerogative of true freedom of choice.