Certain types of loudmouthism should be a capital offense among decent people.

Formal courtesy between husband and wife is even more important than it is between strangers.

War is not violence and killing, pure and simple; war is controlled violence, for a purpose. The purpose of war is to support your government's decisions by force. The purpose is never to kill the enemy just to be killing him but to make him do what you want him to do. Not killing... but controlled and purposeful violence.

Place your clothes and weapons where you can find them in the dark.

Age is not an accomplishment, and youth is not a sin.

People who are busy and happy don't write diaries; they are too busy living.

But space travel can't ease the pressure on a planet grown too crowded not even with today's ships and probably not with any future ships-because stupid people won't leave the slopes of their home volcano even when it starts to smoke and rumble. What space travel does do is drain off the best brains: those smart enough to see a catastrophe before it happens, and with the guts to pay the price-abandon home, wealth, friends, relatives, everything-and go. That's a tiny fraction of one percent. But that's enough.