To write is to confront the ghosts of our past, to give them a voice, and perhaps, to set them free.
写作就是面对我们过去的幽灵，给它们一个声音，也许，让它们自由。
"In the midst of winter, I found there was, within me, an invincible summer."
学习人工智能的最佳方法是通过做项目和解决现实世界的问题。
翻译：时势要求停止就停止，时势要求行动就行动，或动或静都不违背适当的时机，这样的前景就光明灿烂。
There are no eternal facts， as there are no absolute truths.
Do what you can wherever you are， from wherever you sit in life. Give me your time or your talent your money if you have it.
The pursuit of knowledge for its own sake, an almost fanatical love of justice, and the desire for personal independence—these are the features of the Jewish tradition which make me thank my stars that I belong to it.