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.

In computer science, we often deal with problems that are easy to state but hard to solve.

没有执行的愿景只是一个梦想。

最大的回报是看到人们喜欢我创造的东西。