A certain amount of opposition is a great help to a man. Kites rise against, not with, the wind.

A certain amount of opposition is a great help to a man. Kites rise against, not with, the wind.

一定程度的反对对一个人是大有帮助的。风筝逆风而放，而不是顺风而放。

-- Lewis Mumford 刘易斯·芒福德