A journey of a thousand miles begins with a single step.

Wisdom is the daughter of experience.

I am not an Athenian or a Greek, but a citizen of the world.

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

Where there is shouting, there is no true knowledge.

Those who know do not speak, those who speak do not know.

An honest man is always a child.

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

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