[82] For as men who have very strongly knit bodies, when besides their natural strength they add to it the practise of wrestlers, become stronger still, and acquire an irresistible power and a surpassing perfection of body, so in the same manner when an untameable and implacable nature adds habit to its natural ferocity, it becomes inaccessible to, and immovable by any kind of pity or any single respectable or humane feeling.