To write is to confront the ghosts of our past, to give them a voice, and perhaps, to set them free.

数学语言是通用的；它超越了所有文化障碍。

Simplicity is the ultimate sophistication.

The biggest thing is to be yourself and have fun.

我不是榜样，但如果这能让你晚上睡得更好，随便你怎么称呼我。

Feelings are guides to action.

心灵的美胜过外表的美。