Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.

I don't like formal gardens. I like wild nature. It's just the wilderness instinct in me, I guess.

Integrity is the premium of your character.

In a controversy the instant we feel anger we have already ceased striving for the truth, and have begun striving for ourselves.

Climbing to the top demands strength, whether it is to the top of Mount Everest or to the top of your career.

There's not going to be a World War III, because there is no one to have World War III with.

Appearance is something absolute, but reality is not that way - everything is interdependent, not absolute.

We should meet abuse by forbearance. Human nature is so constituted that if we take absolutely no notice of anger or abuse, the person indulging in it will soon weary of it and stop.

Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young. 

Of all the inventions of humans, the computer is going to rank near or at the top as history unfolds and we look back. It is the most awesome tool that we have ever invented. I feel incredibly lucky to be at exactly the right place in Silicon Valley, at exactly the right time, historically, where this invention has taken form.

It is about one's wisdom that came with the years of hardship.

People in democratic nations seem adopt a laidback attitude after voting.