科学家研究自然并非因为它有用；他研究它是因为他从中获得乐趣，而他从中获得乐趣是因为它是美丽的。

Forestry isn't extraction—it's cultivation on nature's timescale.

在计算机科学中，验证过程与创造过程同样重要。

我不知道明天要做什么，我没有计划。我很高兴活着，健康，并且有我的孩子们。

I think it's important to be able to laugh at yourself.

In teaching history， there should be extensive discussion of personalities who benefited mankind through independence of character and judgement.

The past beats inside me like a second heart.