旅行的用途是用现实来调节想象力，而不是想象事情可能是怎样的，而是看到它们实际是怎样的。

过去从未死去。它甚至还没有过去。

The truth is rarely pure and never simple.

The danger of the past was that men became slaves. The danger of the future is that men may become robots.

The true measure of a mining company isn't its stock price, but its stewardship.

The moment you doubt whether you can fly, you cease for ever to be able to do it.

预防性医疗的悖论：越需要的人越不重视。