"I hope that in this year to come, you make mistakes. Because if you are making mistakes, then you are making new things, trying new things, learning, living, pushing yourself, changing yourself, changing your world. You're doing things you've never done before, and more importantly, you're doing something."

The writer must be a defender of the individual against the tyranny of the collective.

圆的周长大于任何内接等边多边形的周长，小于任何外切多边形的周长。