The ability to be alone is the ability to love. It may look paradoxical to you, but it’s not. It is an existential truth: only those who can be alone are capable of love, of sharing, of going into the deepest core of another human being—without possessing the other, without becoming dependent on the other, without reducing the other to a thing, and without becoming addicted to the other.

投资不应该是容易的。如果有人觉得它很容易，那么这个人一定很愚蠢。

系统辨识的挑战不仅在于拟合数据，还在于提取有意义且可推广的模型。

还有许多东西是值得牺牲的，还有这么多的历史等着我们去创造。