Chapter 22.--Whence the Saints Derive Power Against Demons and True Purification of Heart.
It is by true piety that men of God cast out the hostile power of the air which opposes godliness; it is by exorcising it, not by propitiating it; and they overcome all the temptations of the adversary by praying, not to him, but to their own God against him. For the devil cannot conquer or subdue any but those who are in league with sin; and therefore he is conquered in the name of Him who assumed humanity, and that without sin, that Himself being both Priest and Sacrifice, He might bring about the remission of sins, that is to say, might bring it about through the Mediator between God and men, the man Christ Jesus, by whom we are reconciled to God, the cleansing from sin being accomplished. For men are separated from God only by sins, from which we are in this life cleansed not by our own virtue, but by the divine compassion; through His indulgence, not through our own power. For, whatever virtue we call our own is itself bestowed upon us by His goodness. And we might attribute too much to ourselves while in the flesh, unless we lived in the receipt of pardon until we laid it down. This is the reason why there has been vouchsafed to us, through the Mediator, this grace, that we who are polluted by sinful flesh should be cleansed by the likeness of sinful flesh. By this grace of God, wherein He has shown His great compassion toward us, we are both governed by faith in this life, and, after this life, are led onwards to the fullest perfection by the vision of immutable truth.
Chapter 23.--Of the Principles Which, According to the Platonists, Regulate the Purification of the Soul.
Even Porphyry asserts that it was revealed by divine oracles that we are not purified by any sacrifices [416] to sun or moon, meaning it to be inferred that we are not purified by sacrificing to any gods. For what mysteries can purify, if those of the sun and moon, which are esteemed the chief of the celestial gods, do not purify? He says, too, in the same place, that "principles" can purify, lest it should be supposed, from his saying that sacrificing to the sun and moon cannot purify, that sacrificing to some other of the host of gods might do so. And what he as a Platonist means by "principles," we know. [417] For he speaks of God the Father and God the Son, whom he calls (writing in Greek) the intellect or mind of the Father; [418] but of the Holy Spirit he says either nothing, or nothing plainly, for I do not understand what other he speaks of as holding the middle place between these two. For if, like Plotinus in his discussion regarding the three principal substances, [419] he wished us to understand by this third the soul of nature, he would certainly not have given it the middle place between these two, that is, between the Father and the Son. For Plotinus places the soul of nature after the intellect of the Father, while Porphyry, making it the mean, does not place it after, but between the others. No doubt he spoke according to his light, or as he thought expedient; but we assert that the Holy Spirit is the Spirit not of the Father only, nor of the Son only, but of both. For philosophers speak as they have a mind to, and in the most difficult matters do not scruple to offend religious ears; but we are bound to speak according to a certain rule, lest freedom of speech beget impiety of opinion about the matters themselves of which we speak.
[416] Teletis.
[417] The Platonists of the Alexandrian and Athenian schools, from Plotinus to Proclus, are at one in recognizing in God three principles or hypostases: 1st, the One or the Good, which is the Father; 2nd, the Intelligence or Word, which is the Son; 3rd, the Soul, which is the universal principle of life. But as to the nature and order of these hypostases, the Alexandrians are no longer at one with the school of Athens. On the very subtle differences between the Trinity of Plotinus and that of Porphyry, consult M. Jules Simon, ii. 110, and M. Vacherot, ii. 37.--Saisset.
[418] See below, c. 28.
[419] Ennead. v. 1.