A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.

作家的真正力量在于他们能够让读者通过他们的眼睛看世界。

Twenty years from now, you will be more disappointed by the things you didn’t do than the ones you did.So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. （注：这句说话被部分人质疑不是由马克·吐温所说的。）

The best programs are written so that computing machines can perform them quickly and so that human beings can understand them clearly. A programmer is ideally an essayist who works with traditional aesthetic and literary forms as well as mathematical concepts, to communicate the way that an algorithm works and to convince a reader that the results will be correct.

"You are constantly told in depression that your judgment is compromised, but a part of depression is that it touches cognition. That you are having a breakdown does not mean that your life isn't a mess."

To do mathematics is to explore a universe of ideas, where the only limit is your imagination.