So if God would give an important task to a certain person,the first things he does are to temper his will power,fatigue his muscles and bones,starve his stomach and destitute his body.God would not make any kind of his action satisfactory as he wishes in order to shock his heart,make his temperament persistant and dauntless,and?increase his ability.
故天将降大任于斯人也,必先苦其心志,劳其筋骨,饿其体肤,空乏其身,行拂乱其所为.所以动心忍性,曾益其所不能.------孟子