如果它不挑战你，它就不会改变你。
If it doesn't challenge you, it won't change you.
The true test of a mathematical idea is its ability to inspire further thought.
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？
I am not trying to imitate a photograph; I am trying to make one.
世界是你的。