Science progresses by constantly questioning and refining our understanding.
Freedom of men under government is to have a standing rule to live by, common to everyone, and not to be subject to the inconstant, uncertain, arbitrary will of another man.
作战虽然讲究排兵布阵,但士兵的勇敢是其中的根本;丧葬虽然讲究礼节,但对亲人的哀思是其中的根本;一个人虽然很有学识,但思想道德、行为举止是其中的根本。
You can't change what's already happened, so focus on the present moment.