If you've got the truth you can demonstrate it. Talking doesn't prove it.

A dying culture invariably exhibits personal rudeness. Bad manners. Lack of consideration for others in minor matters. A loss of politeness, of gentle manners, is more significant than is a riot.

Never attempt to teach a pig to sing; it wastes your time and annoys the pig.

God is omnipotent, omniscient, and omnibenevolent - it says so right here on the label. If you have a mind capable of believing all three of these attributes simultaneously, I have a wonderful bargain for you. No checks, please. Cash and in small bills.

Heroism' often consists in keeping your head in an emergency and doing the best you can with what you have instead of panicking and being shot in the tail. People who fight this way win more battles than do intentional heroes; a glory hound often throws away the lives of his mates as well as his own.

Straining at gnats and swallowing camels is a required course in law schools.

It may take endless wars and unbearable population pressure to force-feed a technology to the point where it can cope with space. In the universe, space travel may be the normal birth pangs of an otherwise dying race. A test. Some races pass, some fail.