经验是我们给自己的错误取的名字。

数学是给不同事物起相同名称的艺术。

The beauty of life is, while we cannot undo what is done, we can see it, understand it, learn from it and change. So that every new moment is spent not in regret, guilt, fear or anger, but in wisdom, understanding and love.

【释义】不除掉制造内乱的庆父，鲁国的灾难就不会停止。