The second best thing about space travel is that the distances involved make war very difficult, usually impractical, and almost always unnecessary. This is probably a loss for most people, since war is our race's most popular diversion, one which gives purpose and color to dull and stupid lives. But it is a great boon to the intelligent man who fights only when he must-never for sport.

Sex, whatever else it is, is an athletic skill. The more you practice, the more you can, the more you want to, the more you enjoy it, the less it tires you.

Life is short, but the years are long.

Each man is his own prisoner, in solitary confinement for life.

Remember though, your best weapon is between your ears and under your scalp -provided it's loaded.

Humoring them costs nothing and adds to happiness in a world in which happiness is always in short supply.

If men were the automatons that behaviorists claim they are, the behaviorist psychologists could not have invented the amazing nonsense called 'behaviorist psychology.'