I don’t believe in failure because I don’t believe in giving up.
道德的目的是教你,不是受苦和死亡,而是享受自己和生活。
A good mathematician should be both rigorous and imaginative.
The world is before you, and you need not take it or leave it as it was when you came in.
We need to be obsessed with our customers' unmet, unarticulated needs.