You have to be able to admit when you’re wrong and get out of a losing position quickly. The worst thing you can do is hold onto a losing trade hoping it will come back.

You have to be willing to fail to succeed.

The international system is inherently competitive, and states are constantly trying to outmaneuver each other.

Whereof one cannot speak, thereof one must be silent.

很多时候，我们都需要面对选择。如果都有好处，就要取其中好处最大的；如果都有害处，就取其中害处最小的。