44 If anyone were to undertake to tame and train an animal of many forms and shapes, compounded of many animals of various sizes and degrees of tameness and wildness, his principal task, involving a considerable struggle, would be the government of so extraordinary and heterogeneous a nature, since each of the animals of which it is compounded would, according to its nature or habit, be differently affected with joy, pleasure or dislike, by the same words, or food, or stroking with the hand, or whistling, or other modes of treatment. And what must the master of such an animal do, but show himself manifold and various in his knowledge, and apply to each a treatment suitable for it, so as successfully to lead and preserve the beast? And since the common body of the church is composed of many different characters and minds, like a single animal compounded of discordant parts, it is absolutely necessary that its ruler should be at once simple in his uprightness in all respects, and as far as possible manifold and varied in his treatment of individuals, and in dealing with all in an appropriate and suitable manner.
Source: Orations (New Advent)