真相很少是纯粹的，也从来不是简单的。

Habit is habit, and not to be flung out of the window by any man, but coaxed downstairs a step at a time.

每本书都是作者和读者之间的对话。

You can't control how other people feel, but you can control how you react to them.

如果没有了解植物生长规律的农民，最先进的温室也毫无价值。