The past is a place of reference, not a place of residence.

One of my most productive days was throwing away 1000 lines of code.

"A lie can travel halfway around the world while the truth is putting on its shoes."

如果耕种天地，不将天地整理好，这样就相当于是胡闹。耕种天地，一定要将土地平整翻新，然后再去播种。

如果没有经历寒冷的冬天，就不知道松柏的坚韧挺拔；没有经历过危难的事情，就不知道君子志向的远大。