Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
He said that the way of the world is to bloom and to flower and die but in the affairs of men there is no waning and the noon of his expression signals the onset of night. His spirit is exhausted at the peak of its achievement. His meridian is at once his darkening and the evening of his day.
有些伤口永远不会愈合，只会转化。