城市从不沉睡，它的黑暗也是如此。

量化金融最重要的教训是，你必须理解模型的局限性。

I have to remind myself that some birds aren't meant to be caged. Their feathers are just too bright. And when they fly away, the part of you that knows it was a sin to lock them up DOES rejoice. Still, the place you live in is that much more drab and empty that they're gone. I guess I just miss my friend.

成功不在于终点，而在于旅程。