人生是一系列的选择，而最难的那些才是最重要的。

The arithmetic of modular forms is a key to understanding the deeper structures of number theory.

We don't inherit the earth from our ancestors; we borrow it from our children.

The opening up of new markets, foreign or domestic, and the organizational development from the craft shop and factory to such concerns as U.S. Steel illustrate the same process of industrial mutation—if I may use that biological term—that incessantly revolutionizes the economic structure from within, incessantly destroying the old one, incessantly creating a new one.

你停止尝试变得更好的那一刻就是你开始变得更糟的那一刻。