Robert A. Heinlein

One could write a history of science in reverse by assembling the solemn pronouncements of highest authority about what could not be done and could never happen.
Robert A. Heinlein

You can have peace. Or you can have freedom. Don’t ever count on having both at once.
Robert A. Heinlein

A society that gets rid of all its troublemakers goes downhill.
Robert A. Heinlein

One man’s “magic” is another man’s engineering. “Supernatural” is a null word.
Robert A. Heinlein

Political tags – such as royalist, communist, democrat, populist, fascist, liberal, conservative, and so forth – are never basic criteria. The human race divides politically into those who want people to be controlled and those who have no such desire.
Robert A. Heinlein

Sex without love is merely healthy exercise.
Robert A. Heinlein

The difference between science and the fuzzy subjects is that science requires reasoning while those other subjects merely require scholarship.
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

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

Writing is not necessarily something to be ashamed of, but do it in private and wash your hands afterwards.
Robert A. Heinlein

Yield to temptation. It may not pass your way again.
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

The supreme irony of life is that hardly anyone gets out of it alive.
Robert A. Heinlein

Women and cats will do as they please, and men and dogs should relax and get used to the idea.
Robert A. Heinlein

Being right too soon is socially unacceptable.
Robert A. Heinlein

I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do.
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

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

For me, politeness is a sine qua non of civilization.
Robert A. Heinlein

I am free because I know that I alone am morally responsible for everything I do.
Robert A. Heinlein

No statement should be believed because it is made by an authority.
Robert A. Heinlein