所有老人共同的大秘密是，在七八十年里，你真的没有改变。你的身体变了，但你一点都没变。
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.
A writer must be a witness to his or her time, must bear witness to the injustices and the sufferings of the world.
If we believe in data structures, we must believe in independent (hence simultaneous) processing. For why else would we collect items within a structure? Why do we tolerate languages that give us the one without the other?
在数学中，提出问题的艺术必须比解决问题更有价值。