True happiness comes from inner satisfaction.
真正的快乐来自于内心的满足。
Self-education is, I firmly believe, the only kind of education there is.
实现明天的唯一限制将是我们今天的怀疑。
Sustainable fishing is not an option; it is an obligation for future generations.
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.
数学是模式的科学，我们研究它们以理解事物如何运作。
真相很少是纯粹的，也从来不是简单的。