The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.

释义：古往今来的多少事，都付之于人们的谈笑中。

少即是乏味。

反馈是鲁棒控制的关键。

To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things that scare you to death.

I don't think about being the best. I think about being better than yesterday.