The Earth is just too small and fragile a basket for the human race to keep all its eggs in.

The brown monkey's instinct to kill is correct; such men are dangerous to all monkey customs.

I do know that the slickest way to lie is to tell the right amount of truth--then shut up.

In handling a stinging insect, move very slowly.

When I don’t understand, I have an unbearable itch to know why.

Nothing could go wrong because nothing had...I meant "nothing would." No - Then I quit trying to phrase it, realizing that if time travel ever became widespread, English grammar was going to have to add a whole new set of tenses to describe reflexive situations - conjugations that would make the French literary tenses and the Latin historical tenses look simple.

Love your country, but never trust its government.