The essence of business is to solve problems, not just to make money.

存在的每一刻，人要么成长更多，要么退缩更少。

每本书都是一次全新的创作冒险。

应对不自由世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反叛。

I don't have any particular recipe [for developing new proofs] ... It is the reason why doing research is challenging as well as attractive. It's like being lost in a jungle and trying to use all the knowledge that you can gather to come up with some new tricks, and with some luck you might find a way out.