[115] Is it not then the most shameful of all shameful things for a man, in respect of the requital of favours, to be left behind by a dog, for that being, which of all others is the most gentle, to be outrun by the most audacious of beasts? But if we will not be taught by the land animals, let us go across to the nature of the winged birds which traverse the air, and learn what we have need of from them.