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Robert A. Heinlein — Portrait after a picture by Photographer unknown, published by Doubleday (public domain), via Wikimedia Commons.

The quotations of

Robert A. Heinlein

American author and aeronautical engineer

1907–1988

34 quotes, most often on Morality, Life & Death and Laws. Part of the Writers collection.

Sin lies only in hurting other people unnecessarily. All other ‘sins’ are invented nonsense.
Time Enough for Love (1973).
- Morality
Morals — all correct moral laws — derive from the instinct to survive. Moral behavior is survival behavior above the individual level.
Starship Troopers (1959)
- Morality
Selfishness is the bedrock on which all moral behavior starts and it can be immoral only when it conflicts with a higher moral imperative.
The Pragmatics of Patriotism (1973)
- Morality

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