Sustainability isn't a choice—it's a responsibility we owe to the next generation.

The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when to be obeyed.

数学不是关于数字、方程、计算或算法的：它是关于理解的。

过去是一个异国他乡；他们在那里做事的方式不同。

Time is the invisible material in all my works.

最好的想法往往来自于倾听那些最接近问题的人。

科学不仅仅是积累事实；它是关于理解背后的机制。