"If you want to fly, you have to give up what weighs you down."

Life consists not in holding good cards，but in playing well those you hold.

你最不满意的客户是你最大的学习来源。

Diversification is the only free lunch in finance.

解释：乌鸦聚集在一起，虽然看上去很和好，实际上并不亲密；不慎重地结交朋友，虽似牢固，终必破裂。