A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity.

— Robert A. Heinlein

A desire not to butt into other people's business is at least eighty percent of all human wisdom.

— Robert A. Heinlein

A dying culture invariably exhibits personal rudeness. Bad manners. Lack of consideration for others in minor matters. A loss of politeness, of gentle manners, is more significant than is a riot.

— Robert A. Heinlein

A generation which ignores history has no past — and no future.

— Robert A. Heinlein

A hero must herd.

— Robert A. Heinlein

All human behavior, all human motivations, all man’s hopes and fears, were heavily colored and largely controlled by mankind’s tragic and oddly beautiful pattern of reproduction.

— Robert A. Heinlein

All those religions--they contradict each other on every point but every one of them is filled with ways to help people to be brave enough to laugh even though they know they are dying.

— Robert A. Heinlein

Almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so.

— Robert A. Heinlein

An armed society is a polite society. Manners are good when one may have to back up his acts with his life.

— Robert A. Heinlein

. . .and he has never given up his conviction that if you just try all the doors one of them is bound to be the Door into Summer. You know, I think he is right.

— Robert A. Heinlein