Of the Universal Way of the Soul's Deliverance, Which Porphyry Did Not Find Because He Did Not Rightly Seek It, and Which the Grace of Christ Has Alone Thrown Open
This is the religion which possesses the universal way for delivering the soul; for except by this way, none can be delivered. This is a kind of royal way, which alone leads to a kingdom which does not totter like all temporal dignities, but stands firm on eternal foundations. And when Porphyry says, towards the end of the first book De Regressu Animœ, that no system of doctrine which furnishes the universal way for delivering the soul has as yet been received, either from the truest philosophy, or from the ideas and practices of the Indians, or from the reasoning of the Chaldæans, or from any source whatever, and that no historical reading had made him acquainted with that way, he manifestly acknowledges that there is such a way, but that as yet he was not acquainted with it.
Nothing of all that he had so laboriously learned concerning the deliverance of the soul, nothing of all that he seemed to others, if not to himself, to know and believe, satisfied him. For he perceived that there was still wanting a commanding authority which it might be right to follow in a matter of such importance. And when he says that he had not learned from any truest philosophy a system which possessed the universal way of the soul's deliverance, he shows plainly enough, as it seems to me, either that the philosophy of which he was a disciple was not the truest, or that it did not comprehend such a way.
And how can that be the truest philosophy which does not possess this way? For what else is the universal way of the soul's deliverance than that by which all souls universally are delivered, and without which, therefore, no soul is delivered? And when he says, in addition, “or from the ideas and practices of the Indians, or from the reasoning of the Chaldæans, or from any source whatever,” he declares in the most unequivocal language that this universal way of the soul's deliverance was not embraced in what he had learned either from the Indians or the Chaldæans; and yet he could not forbear stating that it was from the Chaldæans he had derived these divine oracles of which he makes such frequent mention.
What, therefore, does he mean by this universal way of the soul's deliverance, which had not yet been made known by any truest philosophy, or by the doctrinal systems of those nations which were considered to have great insight in things divine, because they indulged more freely in a curious and fanciful science and worship of angels? What is this universal way of which he acknowledges his ignorance, if not a way which does not belong to one nation as its special property, but is common to all, and divinely bestowed?
Porphyry, a man of no mediocre abilities, does not question that such a way exists; for he believes that Divine Providence could not have left men destitute of this universal way of delivering the soul. For he does not say that this way does not exist, but that this great boon and assistance has not yet been discovered, and has not come to his knowledge. And no wonder; for Porphyry lived in an age when this universal way of the soul's deliverance—in other words, the Christian religion—was exposed to the persecutions of idolaters and demon-worshippers, and earthly rulers, that the number of martyrs or witnesses for the truth might be completed and consecrated, and that by them proof might be given that we must endure all bodily sufferings in the cause of the holy faith, and for the commendation of the truth.
Porphyry, being a witness of these persecutions, concluded that this way was destined to a speedy extinction, and that it, therefore, was not the universal way of the soul's deliverance, and did not see that the very thing that thus moved him, and deterred him from becoming a Christian, contributed to the confirmation and more effectual commendation of our religion.
Source: City of God (New Advent)