Robert A. Heinlein

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

Don't handicap your children by making their lives easy.

Never underestimate the power of human stupidity.

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.

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

One of the sanest, surest, and most generous joys of life comes from being happy over the good fortune of others.

May you live as long as you wish and love as long as you live.

Everything is theoretically impossible, until it is done.

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

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.

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

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

Never insult anyone by accident.