contented mind is the greatest blessing a man can enjoy in this world.
知足是人生在世最大的幸事。                  Happiness is a butterfly, which ,when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you.
N. Hawthorn, American writer 幸福是一只蝴蝶，你要追逐它的时候，总是追不到；但是如果你悄悄地坐下来，它也许会飞落到你身上。