If you’re not moving forward, you’re falling behind.

There is only one sin, only one. And that is theft. Every other sin is a variation of theft.

伟大的书籍是从不背弃我们的朋友。

聪明的人喜欢水，因为他性情活跃像水一样流动不息，仁慈的人喜欢山，因为他心地淳厚象山一样厚重。聪明的人好动，仁慈的人好静，聪明的人乐观，仁慈的人长寿。

你相信的故事，将成为控制你的故事。

You are never too old to set another goal or to dream a new dream.

I'm not afraid to take a stand. Everybody, come take my hand.

We may encounter many defeats but we must not be defeated.

优化是在给定约束条件下做出最佳决策的艺术。

You have to be comfortable with being uncomfortable if you want to make progress in mathematics.