If my world were to cave in tomorrow, I would look back on all the pleasures, excitements and worthwhilenesses I have been lucky enough to have had. Not the sadness, not my miscarriages or my father leaving home, but the joy of everything else. It will have been enough.

里氏替换原则是面向对象编程中的一个基本概念，它指出子类的对象应该能够替换超类的对象而不影响程序的正确性。

I like to be a free spirit. Some don’t like that, but that’s the way I am.

If something is boring after two minutes, try it for four. If still boring, then eight. Then sixteen. Then thirty-two. Eventually one discovers that it is not boring at all.

如果我们说不同的语言，我们将感知到稍微不同的世界。

你必须能够在犯错时承认并继续前进。