The beauty of physics lies in its ability to explain the complex with simple principles.

The brain is a machine assembled not to understand itself, but to survive. It is a machine for making decisions that lead to survival.

Let me explain. I think it would be very unusual for anyone here, or anyone watching, to be envious of the Queen of England. Even though she is much richer than any of you are, and she's got a very large house, the reason why we don't envy her is because she's too weird.