对于非礼的事，上等到的士人根本不想；对于非礼的事，中等的士人从来不说；对于非礼的事，下等的士人紧闭门户。

In a time of universal deceit - telling the truth is a revolutionary act.

The only way to discover the limits of the possible is to go beyond them into the impossible.

比喻做事要专心致志，不能一心二用。