永远不要停止问：“我们怎样才能做得更好？”

I think that God, in creating Man, somewhat overestimated his ability.

Life is what happens when you're busy making other plans.

保持渴望，保持愚钝，但最重要的是保持谦逊。

The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is probably not important to mathematics.

I have been a selfish being all my life, in practice, though not in principle.