To live is to choose, and every choice has its consequences.

如果人们不相信数学是简单的，那只是因为他们没有意识到生活有多么复杂。

如果我们从一开始就能预见，甚至证明，遵循某种方法我们将达到我们的目标，那么这种解决方法就是完美的。

君子吃饭无求过饱，……做事要勤奋，说话要谨慎，并能接近有道理的人，向他学习，以纠正自己的缺点，这就可以说是好学的人了。

I don't think about the past. The only thing that matters is the future.

You cannot always control what goes on outside. But you can always control what goes on inside.

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.

We must balance economic growth with environmental responsibility.