The farmer is the only man in our economy who buys everything at retail, sells everything at wholesale, and pays the freight both ways.

The true power of mathematics lies in its ability to simplify the complex, making the incomprehensible understandable.

可持续性不仅仅是保护环境，更是创造一个对所有人都有利的系统。

Mathematics is not a spectator sport; you have to play to understand.

在这个常常奖励自私的世界里，善良可以是一种革命性的行为。

死者比生者更忠实。他们不会改变。