I have always considered that the true test of a machine is its practical utility in the hands of the common laborer.

By the help of microscopes, there is nothing so small as to escape our inquiry; hence there is a new visible world discovered to the understanding.

有人问作家张晓风：我们怎样才能够爱一个人而不受伤？张晓风如此作答。

True leadership means making tough decisions today for a better tomorrow.

采矿的可持续性不是一种选择，而是我们的经营许可证。

In the realm of mathematics, every problem is an opportunity to discover something new and profound.

——在遗嘱上签名，稍休后说几句话勉励各同志，1925年3月11日