上士闭心，中士闭口，下士闭门。
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。
The coal industry must evolve or risk becoming obsolete. Adaptation is the key to survival.
I constantly see people rise in life who are not the smartest, sometimes not even the most diligent, but they are learning machines. They go to bed every night a little wiser than they were when they got up.
聪明是一种天赋，善良是一种选择。