Conquering others takes force, conquering yourself is true strength.

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

There are two things a person should never be angry at, what they can help, and what they cannot.

There's no one thing that's true. It's all true.

If you tell the truth, you don't have to remember anything.

If you can't explain it to a six year old, you don't understand it yourself.

I believe in God, but not as one thing, not as an old man in the sky. I believe that what people call God is something in all of us. I believe that what Jesus and Mohammed and Buddha and all the rest ...

Always go too far, because that's where you'll find the truth.