If you have any talent, or any occupation that delights you, do it, and do it to the hilt. Don't ask why, or what difficulties you may get into.

There is enough energy in a single cubic meter of space to boil all the oceans in the world.

I believe that a scientist looking at nonscientific problems is just as dumb as the next guy.

There's plenty of room at the bottom.

I think Nature's imagination is so much greater than man's, she's never gonna let us relax!

Know your place in the world and evaluate yourself fairly, not in terms of the naïve ideals of your own youth, nor in terms of what you erroneously imagine your teacher's ideals are.

But logic is not all, one needs one's heart to follow an idea.