解读：知晓道理容易，付诸实践却困难重重，很多人困于理论，缺乏行动力，知行脱节带来巨大的挫败感与自我怀疑，督促人行动起来。

You have to be ruthless in business, but fair at the same time.

"The magic of reading is that it allows us to live a thousand lives."

在数学中，提出问题的艺术必须比解决问题更有价值。

The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.