Quotes by Robert A. Heinlein


Never try to teach a pig to sing; it wastes your time and it annoys the pig.
– Robert A. Heinlein
A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity.
– Robert A. Heinlein
A society that gets rid of all its troublemakers goes downhill.
– Robert A. Heinlein
Anyone who considers protocol unimportant has never dealt with a cat.
– Robert A. Heinlein
Be wary of strong drink. It can make you shoot at tax collectors... and miss.
– Robert A. Heinlein
By cultivating the beautiful we scatter the seeds of heavenly flowers, as by doing good we cultivate those that belong to humanity.
– Robert A. Heinlein
Don't ever become a pessimist... a pessimist is correct oftener than an optimist, but an optimist has more fun, and neither can stop the march of events.
– Robert A. Heinlein
Don't handicap your children by making their lives easy.
– Robert A. Heinlein
Everything is theoretically impossible, until it is done.
– Robert A. Heinlein
For me, politeness is a sine qua non of civilization.
– Robert A. Heinlein
I don't see how an article of clothing can be indecent. A person, yes.
– Robert A. Heinlein
I never learned from a man who agreed with me.
– Robert A. Heinlein
If you disturb the patient at such times, he may break into tears or become violent. and, if you shake him, he bites.
– Robert A. Heinlein
It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so.
– Robert A. Heinlein
It's an indulgence to sit in a room and discuss your beliefs as if they were a juicy piece of gossip.
– Robert A. Heinlein
Love is that condition in which the happiness of another person is essential to your own... Jealousy is a disease, love is a healthy condition. The immature mind often mistakes one for the other, or assumes that the greater the love, the greater the jealousy.
– Robert A. Heinlein
May you live as long as you wish and love as long as you live.
– Robert A. Heinlein
Never insult anyone by accident.
– Robert A. Heinlein
Never underestimate the power of human stupidity.
– Robert A. Heinlein
Never worry about theory as long as the machinery does what it's supposed to do.
– Robert A. Heinlein