种树的最佳时间是二十年前，其次是现在。

You are not the opinion of somebody who doesn't know you.

The challenge of our time is to build an economy that works for everyone, not just the privileged few.

处于逆境，思想要开拓放达，奋发图强；处于顺境，思想要警觉收敛，约束自身。