资本资产定价模型并非旨在描述投资者实际行为的实证理论，而是关于理性投资者应如何行事的规范理论。

I want to be a tree, not because trees don't speak, but because trees don't lie.

Not only do we live in the world of thought， but also in the world of matter.

The past is a shadow that follows us, but it is our choice whether to let it define us.

"The best ideas come when you're not trying too hard."

Stay Hungry. Stay Foolish. And I have always wished that for myself. And now, as you graduate to begin anew, I wish that for you.