出自先秦《荀子·性恶》引古语。不知儿子的为人，看看他的朋友就清楚了；不知国君是否贤明，看看他左右的大臣是什么德行就知道了。

I guess Lieutenant Dan figured there's some things you just can't change. He didn't want to be called crippled, just like I didn't want to be called stupid.

中心地的六边形排列最小化了市场区域的重叠。

Quality is not an act, it is a habit.

The simple step of a courageous individual is not to take part in the lie. One word of truth outweighs the world. In keeping silent about evil, in burying it so deep within us that no sign of it appears on the surface, we are implanting it, and it will rise up a thousand fold in the future.

To understand the future, one must first understand the past.