130 How incredible are these things! How odious! How much more fitting is it to believe in accordance with nature, in accordance with what takes place in every kind of fruit; to believe in accordance with the pattern of what has happened, in accordance with the utterances of prophets, and the heavenly promise of Christ! For what is better than to be sure that the work of God does not perish, and that those who are made in the image and likeness of God cannot be transformed into the shapes of beasts; since in truth it is not the form of the body but of the spirit which is made after the likeness of God. For in what manner could man, to whom are subjected the other kinds of living creatures, migrate with the better part of himself into an animal subjected to himself? Nature does not suffer this, and if nature did grace would not.
Source: On the Death of Satyrus (New Advent)