数学的本质不仅在于解决问题，还在于提出正确的问题。

Those of us who have been fortunate have a duty to give back.Whether one gives a lot as one goes along as I do, or a little and then a lot (when one dies) as Warren does, is a matter of personal preference.

一本伟大的书不是被阅读的书，而是阅读你的书，揭示你灵魂的深处。

成功的关键是在生活的各个方面不断成长——精神、情感、灵性以及身体。