Youth is life as yet unblemished by much tragedy, but hardly by TV.

Philosophy begins in wonder. And, at the end, when philosophic thought has done its best, the wonder remains.

I have always noticed that deeply and truly religious persons are fond of a joke, and I am suspicious of those who aren't.

Great dreamers' dreams are never fulfilled, they are always transcended.

Civilization advances by extending the number of important operations which we can perform without thinking about them. Operations of thought are cavalry charges in a battle - they are limited in number, they require fresh horses, and must only be made at decisive moments.

Error is the price we pay for progress.

What is morality in any given time or place? It is what the majority then and there happen to like and immorality is what they dislike.