风平浪静比狂风暴雨更恶劣， 毫无敌人比任何敌人更危险。 There is no storm worse than calm, and no foe more dangerous than to have no foes.

要所有人走同一条路是危险的：把自己和别人比较更坏。 It is dangerous to make everybody go forward by the same road: and worse to measure others by oneself.