所有老年人共享的大秘密是，你在七八十年里真的没有改变。你的身体变了，但你一点也没变。当然，这会引起很大的混乱。
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.
People calculate too much think too little.
变化的速度要求我们忘记的和学习的一样多。