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

True freedom is the capacity for acting according to one's true character, to be altogether one's self, to be self-determined and not subject to outside coercion.

The act of willing this or that, of choosing among various courses of conduct, is central in the realm of ethics.

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

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

To define twentieth-century humanism briefly, I would say that it is a philosophy of joyous service for the greater good of all humanity in this natural world and advocating the methods of reason, science, and democracy.

Feelings of right and wrong that at first have their locus within the family gradually develop into a pattern for the tribe or city, then spread to the much larger unit of the nation, and finally from the nation to mankind as a whole.