Your time is limited, so don't waste it living someone else's life.
As to the gods, I do not know whether they exist or not, nor what they are like in form; for there are many things that hinder sure knowledge, the obscurity of the matter and the shortness of human life.
领导力的作用是产生更多的领导者，而不是更多的追随者。
煤炭行业必须发展以满足现代环境标准，否则将被淘汰。