数学不是关于数字、方程、计算或算法的:它是关于理解的。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
——〈民权主义第五讲〉,1924年4月20日
Happiness is a good flow of life; the conviction that you are taking part in the universe's purpose.
幸福是生活的良好流动,一种深信自己参与了宇宙目的的信念。