In the body there are two creatures, and they are both in enmity with each other. For one to do anything, the other has to be subjected to it. One has a mind and the other only has an appetite. The more the mind gets, the more it is satisfied, but the more the appetite gets, the more its hunger grows; its appetite is for imaginary things, it dreams that it is eating, but when it wake, which it dreads to do, it is empty and pangs.