Invert, always invert: Turn a situation or problem upside down.Look at it backward.

想象力创造现实。

自然是最好的向导，追随她的人必定不会犯错。

The goal of cryptography is to make it so that the cost of breaking the system exceeds the value of the information protected.

当别人都不相信你时，你必须相信自己。