A family reunion is an effective form of birth control.

Many short-sighted fools think that going to the Moon was just a stunt. But the astronauts knew the meaning of what they were doing, as is shown by Neil Armstrong's first words in stepping down onto the soil of Luna: "One small step for a man, one giant leap for mankind."

Daughters can spend ten percent more than a man can make in any usual occupation. That’s a law of nature, to be known henceforth as ‘Harshaw’s Law.

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.

Never crowd youngsters about their private affairs - sex especially.

Money problems can always be solved by a man not frightened by them.

Be wary of strong drink. It can make you shoot at tax collectors... and miss.