XXIII. Again, where do you get your Unbegotten and Unoriginate, those two citadels of your position, or we our Immortal? Show me these in so many words, or we shall either set them aside, or erase them as not contained in Scripture; and you are slain by your own principle, the names you rely on being overthrown, and therewith the wall of refuge in which you trusted. Is it not evident that they are due to passages which imply them, though the words do not actually occur? What are these passages?—I am the first, and I am the last, and before Me there was no God, neither shall there be after Me. For all that depends on that Am makes for my side, for it has neither beginning nor ending. When you accept this, that nothing is before Him, and that He has not an older Cause, you have implicitly given Him the titles Unbegotten and Unoriginate. And to say that He has no end of Being is to call Him Immortal and Indestructible. The first pairs, then, that I referred to are accounted for thus. But what are the things which neither exist in fact nor are said? That God is evil; that a sphere is square; that the past is present; that man is not a compound being. Have you ever known a man of such stupidity as to venture either to think or to assert any such thing? It remains to show what are the things which exist, both in fact and in language. God, Man, Angel, Judgment, Vanity (viz., such arguments as yours), and the subversion of faith and emptying of the mystery.
XXIV. Since, then, there is so much difference in terms and things, why are you such a slave to the letter, and a partisan of the Jewish wisdom, and a follower of syllables at the expense of facts? But if, when you said twice five or twice seven, I concluded from your words that you meant Ten or Fourteen; or if, when you spoke of a rational and mortal animal, that you meant Man, should you think me to be talking nonsense? Surely not, because I should be merely repeating your own meaning; for words do not belong more to the speaker of them than to him who called them forth. As, then, in this case, I should have been looking, not so much at the terms used, as at the thoughts they were meant to convey; so neither, if I found something else either not at all or not clearly expressed in the Words of Scripture to be included in the meaning, should I avoid giving it utterance, out of fear of your sophistical trick about terms. In this way, then, we shall hold our own against the semi-orthodox—among whom I may not count you. For since you deny the Titles of the Son, which are so many and so clear, it is quite evident that even if you learnt a great many more and clearer ones you would not be moved to reverence. But now I will take up the argument again a little way further back, and show you, though you are so clever, the reason for this entire system of secresy.
XXV. There have been in the whole period of the duration of the world two conspicuous changes of men's lives, which are also called two Testaments, or, on account of the wide fame of the matter, two Earthquakes; the one from idols to the Law, the other from the Law to the Gospel. And we are taught in the Gospel of a third earthquake, namely, from this Earth to that which cannot be shaken or moved. Now the two Testaments are alike in this respect, that the change was not made on a sudden, nor at the first movement of the endeavour. Why not (for this is a point on which we must have information)? That no violence might be done to us, but that we might be moved by persuasion. For nothing that is involuntary is durable; like streams or trees which are kept back by force. But that which is voluntary is more durable and safe. The former is due to one who uses force, the latter is ours; the one is due to the gentleness of God, the other to a tyrannical authority. Wherefore God did not think it behooved Him to benefit the unwilling, but to do good to the willing. And therefore like a Tutor or Physician He partly removes and partly condones ancestral habits, conceding some little of what tended to pleasure, just as medical men do with their patients, that their medicine may be taken, being artfully blended with what is nice. For it is no very easy matter to change from those habits which custom and use have made honourable. For instance, the first cut off the idol, but left the sacrifices; the second, while it destroyed the sacrifices did not forbid circumcision. Then, when once men had submitted to the curtailment, they also yielded that which had been conceded to them; in the first instance the sacrifices, in the second circumcision; and became instead of Gentiles, Jews, and instead of Jews, Christians, being beguiled into the Gospel by gradual changes. Paul is a proof of this; for having at one time administered circumcision, and submitted to legal purification, he advanced till he could say, and I, brethren, if I yet preach circumcision, why do I yet suffer persecution? His former conduct belonged to the temporary dispensation, his latter to maturity.
XXVI. To this I may compare the case of Theology except that it proceeds the reverse way. For in the case by which I have illustrated it the change is made by successive subtractions; whereas here perfection is reached by additions. For the matter stands thus. The Old Testament proclaimed the Father openly, and the Son more obscurely. The New manifested the Son, and suggested the Deity of the Spirit. Now the Spirit Himself dwells among us, and supplies us with a clearer demonstration of Himself. For it was not safe, when the Godhead of the Father was not yet acknowledged, plainly to proclaim the Son; nor when that of the Son was not yet received to burden us further (if I may use so bold an expression) with the Holy Ghost; lest perhaps people might, like men loaded with food beyond their strength, and presenting eyes as yet too weak to bear it to the sun's light, risk the loss even of that which was within the reach of their powers; but that by gradual additions, and, as David says, Goings up, and advances and progress from glory to glory, the Light of the Trinity might shine upon the more illuminated. For this reason it was, I think, that He gradually came to dwell in the Disciples, measuring Himself out to them according to their capacity to receive Him, at the beginning of the Gospel, after the Passion, after the Ascension, making perfect their powers, being breathed upon them, and appearing in fiery tongues. And indeed it is little by little that He is declared by Jesus, as you will learn for yourself if you will read more carefully. I will ask the Father, He says, and He will send you another Comforter, even the spirit of Truth. This He said that He might not seem to be a rival God, or to make His discourses to them by another authority. Again, He shall send Him, but it is in My Name. He leaves out the I will ask, but He keeps the Shall send, then again, I will send,—His own dignity. Then shall come, the authority of the Spirit.
Source: Orations (New Advent)