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.

你的时间有限，所以不要浪费在过别人的生活上。

我们应该忘记小的效率，大约97%的时间：过早的优化是万恶之源。

我们都是由星尘构成的，探索星星是我们的命运。