历史学家必须是诗人，不是为了创造，而是为了重新创造。

The idea that we will make a society where literally everybody is graded, the good at the top, bad at the bottom, exactly done as it should be, is impossible. There are simply too many random factors: accidents, accidents of birth, accidents of things dropping on people's heads, illnesses, etc. We will never get to grade them, never get to grade people as they should.

花开时可以折取就要及时折取，不要等到花谢了只能折取空枝。