爱上一个人时，我们总会试着成为更好的人。在我们努力成为更好的人之时，生命中的每一件事，也会变得更美好。

The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

You’ll get 10x better results by elevating good behavior rather than punishing bad behavior， especially in children and animals.

纯数学和应用数学之间的相互作用是真正创新发生的地方。