译文：年华随同时光飞快逝去，意志随同岁月而丧失。最终(像黄叶一样)枯老衰落，大多不接触世事，对社会没有任何贡献，只能悲哀困守在自己破败的房子里，那时再悔恨又怎么来得及!

"The soul becomes dyed with the color of its thoughts."

The study of computational complexity is not just about classifying problems; it is about understanding the nature of computation itself.

Each generation takes the earth as trustees.

You don't learn to walk by following rules. You learn by doing, and by falling over.

A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.