Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. That's relativity.

Coincidence is God's way of remaining anonymous.

The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it.

Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution.

Reality is merely an illusion, albeit a very persistent one.

Education is what remains after one has forgotten everything he learned in school.