强调资源、目标和取舍的重要性。

We are all in the gutter, but some of us are looking at the stars.

生活上，不能吃光，不能穿光，说话时留有余地；处事上，又要懂得，又要做得，遇逆境还要善于忍耐。

It's easier to ask forgiveness than it is to get permission.

The only way to understand another person's reality is to experience it yourself.

Hope is a good thing, maybe the best of things, and no good thing ever dies.

To teach mathematics is to inspire the next generation of thinkers and problem solvers.

作家是由他的主题选择的——他的主题是他所处时代的意识。