But since these falsely named [gnostics] calumniate the body, let them learn that the harmonious mechanism of the body contributes to the understanding which leads to goodness of nature. Wherefore in the third book of the Republic, Plato, whom they appeal to loudly as an authority that disparages generation, says, “that for the sake of harmony of soul, care must be taken for the body,” by which, he who announces the proclamation of the truth, finds it possible to live, and to live well. For it is by the path of life and health that we learn gnosis. But is he who cannot advance to the height without being occupied with necessary things, and through them doing what tends to knowledge, not to choose to live well? In living, then, living well is secured. And he who in the body has devoted himself to a good life, is being sent on to the state of immortality.