The most important thing is to be honest with yourself and with what you do.

Small changes in the environment can have big effects on behavior.

"The only limits in life are the ones you make."

Don't worry about what anybody else is going to do. The best way to predict the future is to invent it.

A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between theories and the best mathematician can notice analogies between analogies.