The metals we pull from the ground should build bridges between people, not walls.

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

我不是那种在关键时刻退缩的人。

The great advantage of old age is that you can be as rude as you like.

I have learned to seek my happiness by limiting my desires， rather than in attempting to satisfy them.