I draw from the crowd a lot.

质量不是保证；它是一种承诺。

He who fights with monsters should be careful lest he thereby become a monster.

【释义】：早晨能发现昨夜的错误，今日能悔改昨日的过失。  

最危险的毒药是成就感，解药是每晚思考明天如何做得更好。