City of God, Book X
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 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. For he speaks of God the Father and God the Son, whom he calls (writing in Greek) the intellect or mind of the Father; 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, 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.
Chapter 24.—Of the One Only True Principle Which Alone Purifies and Renews Human Nature.
Accordingly, when we speak of God, we do not affirm two or three principles, no more than we are at liberty to affirm two or three gods; although, speaking of each, of the Father, or of the Son, or of the Holy Ghost, we confess that each is God: and yet we do not say, as the Sabellian heretics say, that the Father is the same as the Son, and the Holy Spirit the same as the Father and the Son; but we say that the Father is the Father of the Son, and the Son the Son of the Father, and that the Holy Spirit of the Father and the Son is neither the Father nor the Son. It was therefore truly said that man is cleansed only by a Principle, although the Platonists erred in speaking in the plural of principles. But Porphyry, being under the dominion of these envious powers, whose influence he was at once ashamed of and afraid to throw off, refused to recognize that Christ is the Principle by whose incarnation we are purified. Indeed he despised Him, because of the flesh itself which He assumed, that He might offer a sacrifice for our purification,—a great mystery, unintelligible to Porphyry’s pride, which that true and benignant Redeemer brought low by His humility, manifesting Himself to mortals by the mortality which He assumed, and which the malignant and deceitful mediators are proud of wanting, promising, as the boon of immortals, a deceptive assistance to wretched men. Thus the good and true Mediator showed that it is sin which is evil, and not the substance or nature of flesh; for this, together with the human soul, could without sin be both assumed and retained, and laid down in death, and changed to something better by resurrection.
He showed also that death itself, although the punishment of sin, was submitted to by Him for our sakes without sin, and must not be evaded by sin on our part, but rather, if opportunity serves, be borne for righteousness’ sake. For he was able to expiate sins by dying, because He both died, and not for sin of His own. But He has not been recognized by Porphyry as the Principle, otherwise he would have recognized Him as the Purifier. The Principle is neither the flesh nor the human soul in Christ but the Word by which all things were made.
The flesh, therefore, does not by its own virtue purify, but by virtue of the Word by which it was assumed, when “the Word became flesh and dwelt among us.” For speaking mystically of eating His flesh, when those who did not understand Him were offended and went away, saying, “This is an hard saying, who can hear it?” He answered to the rest who remained, “It is the Spirit that quickeneth;
the flesh profiteth nothing.” The Principle, therefore, having assumed a human soul and flesh, cleanses the soul and flesh of believers. Therefore, when the Jews asked Him who He was, He answered that He was the Principle. And this we carnal and feeble men, liable to sin, and involved in the darkness of ignorance, could not possibly understand, unless we were cleansed and healed by Him, both by means of what we were, and of what we were not. For we were men, but we were not righteous; whereas in His incarnation there was a human nature, but it was righteous, and not sinful.
This is the mediation whereby a hand is stretched to the lapsed and fallen; this is the seed “ordained by angels,” by whose ministry the law also was given enjoining the worship of one God, and promising that this Mediator should come.
Chapter 25.—That All the Saints, Both Under the Law and Before It, Were Justified by Faith in the Mystery of Christ’s Incarnation.
It was by faith in this mystery, and godliness of life, that purification was attainable even by the saints of old, whether before the law was given to the Hebrews (for God and the angels were even then present as instructors), or in the periods under the law, although the promises of spiritual things, being presented in figure, seemed to be carnal, and hence the name of Old Testament. For it was then the prophets lived, by whom, as by angels, the same promise was announced; and among them was he whose grand and divine sentiment regarding the end and supreme good of man I have just now quoted, “It is good for me to cleave to God.” In this psalm the distinction between the Old and New Testaments is distinctly announced. For the Psalmist says, that when he saw that the carnal and earthly promises were abundantly enjoyed by the ungodly, his feet were almost gone, his steps had well-nigh slipped; and that it seemed to him as if he had served God in vain, when he saw that those who despised God increased in that prosperity which he looked for at God’s hand.
He says, too, that, in investigating this matter with the desire of understanding why it was so, he had labored in vain, until he went into the sanctuary of God, and understood the end of those whom he had erroneously considered happy. Then he understood that they were cast down by that very thing, as he says, which they had made their boast, and that they had been consumed and perished for their inequities; and that that whole fabric of temporal prosperity had become as a dream when one awaketh, and suddenly finds himself destitute of all the joys he had imaged in sleep. And, as in this earth or earthy city they seemed to themselves to be great, he says, “O Lord, in Thy city Thou wilt reduce their image to nothing.”
He also shows how beneficial it had been for him to seek even earthly blessings only from the one true God, in whose power are all things, for he says, “As a beast was I before Thee, and I am always with Thee.” “As a beast,” he says, meaning that he was stupid. For I ought to have sought from Thee such things as the ungodly could not enjoy as well as I, and not those things which I saw them enjoying in abundance, and hence concluded I was serving Thee in vain, because they who declined to serve Thee had what I had not. Nevertheless, “I am always with Thee,” because even in my desire for such things I did not pray to other gods. And consequently he goes on, “Thou hast holden me by my right hand, and by Thy counsel Thou hast guided me, and with glory hast taken me up;” as if all earthly advantages were left-hand blessings, though, when he saw them enjoyed by the wicked, his feet had almost gone. “For what,” he says, “have I in heaven, and what have I desired from Thee upon earth?”
He blames himself, and is justly displeased with himself; because, though he had in heaven so vast a possession (as he afterwards understood), he yet sought from his God on earth a transitory and fleeting happiness;—a happiness of mire, we may say. “My heart and my flesh,” he says, “fail, O God of my heart.” Happy failure, from things below to things above! And hence in another psalm He says, “My soul longeth, yea, even faileth, for the courts of the Lord.” Yet, though he had said of both his heart and his flesh that they were failing, he did not say, O God of my heart and my flesh, but, O God of my heart; for by the heart the flesh is made clean. Therefore, says the Lord, “Cleanse that which is within, and the outside shall be clean also.”
He then says that God Himself,—not anything received from Him, but Himself,—is his portion. “The God of my heart, and my portion for ever.” Among the various objects of human choice, God alone satisfied him. “For, lo,” he says, “they that are far from Thee shall perish: