The only way to learn mathematics is to do mathematics.

——致书蒋介石，1920年10月29日

Quality is not a technique, it is a philosophy.

殖民地是一个新人类计划将被测试的地方，在那里一个无国界、无种族和无国家世界的梦想将被实现。

If a Nation expects to be ignorant and free in a state of civilization,it expects what never was and never will be....If we are to guard against ignorance and remain free,it is the responsibility of every American to be informed."

感恩释放了生命的丰盛。它将我们所拥有的变成足够，甚至更多。它将拒绝变成接受，混乱变成秩序，困惑变成清晰。它可以将一顿饭变成盛宴，一所房子变成家，一个陌生人变成朋友。