个愚蠢的人知道自己的愚蠢，这使他至少是聪明的。一位愚蠢的人以为自己聪明，这才是真正的愚蠢。

Writing is rewriting.

The best way to solve a problem is to think about it in a different way.

Stray birds of summer come to my window to sing and fly away。 And yellow leaves of autumn， which have no songs， flutter and fall there with a sigh。