Self-preservation is the first law of nature.

If you follow reason far enough it always leads to conclusions that are contrary to reason.

All progress is based upon a universal innate desire on the part of every organism to live beyond its income.

A virtue to be serviceable must, like gold, be alloyed with some commoner, but more durable alloy.

The best liar is he who makes the smallest amount of lying go the longest way.

There is no such source of error as the pursuit of truth.

Brigands demand your money or your life; women require both.