有人说：“如果用恩德来回报别人对自己的怨仇，行不行呢？”孔子说：“这样的话，你将用什么来报答别人对你的恩德呢？不如以公正对待怨仇，以恩德报答恩德。”

Sometimes you can do everything right and things will still go wrong. The key is to never stop doing right.

"You can't change the past, but you can change the meaning of the past."

The real challenge is not in solving the equations, but in understanding what the solutions mean.