If you’re going to talk the talk, you’ve got to walk the walk.

I must study politics and war that my sons may have liberty to study mathematics and philosophy.

I’m a very positive thinker, and I think that is what helps me the most in difficult moments.

在商业中，就像在科学中一样，最重大的突破来自于挑战现状。

你的时间有限，不要浪费在过别人的生活上。