The only thing we can know is that we know nothing and that is the highest flight of human wisdom.

Life is 10% what happens to you and 90% how you react to it.

"Reading is the most powerful tool we have."

美联储目前没有预测会出现经济衰退。

Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.