And so he will see even the real gaping jaws of wild beasts with no less pleasure than those which painters and sculptors show by imitation; and in an old woman and an old man he will be able to see a certain maturity and comeliness; and the attractive loveliness of young persons he will be able to look on with chaste eyes; and many such things will present themselves, not pleasing to every man, but to him only who has become truly familiar with nature and her works.