质量不是一种行为，而是一种习惯。

史记

我认为数学家的作用是发现这些模式并解释它们。

I shall die again and again to know that life is inexhaustible.

We don’t start with models. We start with data. We don’t have any preconceived notions. We look for things that can be replicated thousands of times. A trouble with convergence trading is that you don’t have a time scale. You say that eventually things will come together.Well， when is eventually？

Age is foolish and forgetful when it underestimates youth.