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

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

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

Being right too soon is socially unacceptable.
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 am free because I know that I alone am morally responsible for everything I do.
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

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

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