A man is a fool not to put everything he has, at any given moment, into what he is creating.

If wishes were fishes, we'd all cast nets.

All proofs inevitably lead to propositions which have no proof! All things are known because we want to believe in them.

Clinging to any form of conservatism can be dangerous. Become too conservative and you are unprepared for surprises. You cannot depend on luck. Logic is blind and often knows only its own past. Logic is good for playing chess but is often too slow for the needs of survival.

It must certainly be more dangerous to live in ignorance than to live with knowledge.

His voice was low, charged with unspeakable adjectives.

When you think you know something: that is a most perfect barrier against learning.