译文：想要看清一个人，应当看看他交的是什么朋友。

在机器学习中，偏差和方差之间的权衡对于实现良好的泛化至关重要。

"Cada palavra escrita é um ato de coragem, uma declaração de existência."

喜欢说话而又不恰当，不如少说话为好。博学多识但不知道反省自己，一定会出问题。孔子说“言寡尤，行寡悔，禄在其中矣” ，言语上减少过失，行为上减少悔恨，多反省自己，慎言慎行，成功就不会远了。

计算理论的美在于它能够将世界的复杂性抽象成可管理和可理解的模型。

One of the best rules anybody can learn about investing is to do nothing, absolutely nothing, unless there is something to do... I just wait until there is money lying in the corner, and all I have to do is go over there and pick it up.