Everything is light, everything is warmth, everything is electricity, everything is a magnetic field, everything is you.

It would seem that you have no useful skill or talent whatsoever, " he said. "Have you thought of going into teaching?

If you like someone, you tell the truth because that, to me, is respect. If you hate someone, you tell them the truth because what do you have to lose?

If your wish is to become really a man of science and not merely a petty experimentalist, I should advise you to apply to every branch of natural philosophy, including mathematics.

Imagine no limitations; decide what's right and desirable before you decide what's possible.

Happiness is not a destination. It is a method of life.

There is little evidence that other animals judge the appropriateness of actions that do not directly affect themselves.

My hair's been every color. My hair's been all over the map.

…often between ourselves and those nearest and dearest to us there exists a reserve which it is very hard to overcome.

Just like the Alamo, somebody damn well needed to go to their aid. Well, by God, I'm going to Viet Nam's aid!

Young people want you to be real with them.