The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.

The world is a conspiracy to keep you from knowing the truth.

The molecules that mediate pain are ancient, revealing how deeply rooted this sensation is in evolution.

爱是唯一在你给予时增长的东西。

I'm not perfect, but I'm always striving to be better.