幸福有益于身体,但悲伤才能发展心灵的力量。
Happiness is beneficial for the body, but it is grief that develops the powers of the mind.
贪婪的欲望会带来痛苦,舍弃贪欲才能获得真正的快乐。
It is the duty of the human understanding to understand that there are things which it cannot understand.