"The only way to make sense out of change is to plunge into it, move with it, and join the dance."

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.

Every mathematical problem has a solution; it just takes time and effort to find it.

我们必须平衡能源需求与保护地球的责任。