所有老年人共有的巨大秘密是，在七八十年里你其实根本没有改变。你的身体变了，但你一点都没变。这当然会造成巨大的困惑。
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 purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
有时候你无法独自完成。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
经验只是我们给错误取的名字。
Great design solves problems you didn't know you had in ways you never expected.
过去总是紧张的，未来是完美的。