XVII. We will begin thus. The Deity cannot be expressed in words. And this is proved to us, not only by argument, but by the wisest and most ancient of the Hebrews, so far as they have given us reason for conjecture. For they appropriated certain characters to the honour of the Deity, and would not even allow the name of anything inferior to God to be written with the same letters as that of God, because to their minds it was improper that the Deity should even to that extent admit any of His creatures to a share with Himself. How then could they have admitted that the invisible and separate Nature can be explained by divisible words? For neither has any one yet breathed the whole air, nor has any mind entirely comprehended, or speech exhaustively contained the Being of God. But we sketch Him by His Attributes, and so obtain a certain faint and feeble and partial idea concerning Him, and our best Theologian is he who has, not indeed discovered the whole, for our present chain does not allow of our seeing the whole, but conceived of Him to a greater extent than another, and gathered in himself more of the Likeness or adumbration of the Truth, or whatever we may call it.
XVIII. As far then as we can reach, He Who Is, and God, are the special names of His Essence; and of these especially He Who Is, not only because when He spoke to Moses in the mount, and Moses asked what His Name was, this was what He called Himself, bidding him say to the people "I Am has sent me," but also because we find that this Name is the more strictly appropriate. For the Name Qeo/j (God), even if, as those who are skilful in these matters say, it were derived from Qe/ein (to run) or from Ai!qein (to blaze), from continual motion, and because He consumes evil conditions of things (from which fact He is also called A Consuming Fire), would still be one of the Relative Names, and not an Absolute one; as again is the case with Lord, which also is called a name of God. I am the Lord Your God, He says, that is My name; and, The Lord is His name. But we are enquiring into a Nature Whose Being is absolute and not into Being bound up with something else. But Being is in its proper sense peculiar to God, and belongs to Him entirely, and is not limited or cut short by any Before or After, for indeed in him there is no past or future.
XIX. Of the other titles, some are evidently names of His Authority, others of His Government of the world, and of this viewed under a twofold aspect, the one before the other in the Incarnation. For instance the Almighty, the King of Glory, or of The Ages, or of The Powers, or of The Beloved, or of Kings. Or again the Lord of Sabaoth, that is of Hosts, or of Powers, or of Lords; these are clearly titles belonging to His Authority. But the God either of Salvation or of Vengeance, or of Peace, or of Righteousness; or of Abraham, Isaac, and Jacob, and of all the spiritual Israel that sees God,-these belong to His Government. For since we are governed by these three things, the fear of punishment, the hope of salvation and of glory besides, and the practice of the virtues by which these are attained, the Name of the God of Vengeance governs fear, and that of the God of Salvation our hope, and that of the God of Virtues our practice; that whoever attains to any of these may, as carrying God in himself, press on yet more unto perfection, and to that affinity which arises out of virtues. Now these are Names common to the Godhead, but the Proper Name of the Unoriginate is Father, and that of the unoriginately Begotten is Son, and that of the unbegottenly Proceeding or going forth is The Holy Ghost. Let us proceed then to the Names of the Son, which were our starting point in this part of our argument.
XX. In my opinion He is called Son because He is identical with the Father in Essence; and not only for this reason, but also because He is Of Him. And He is called Only-Begotten, not because He is the only Son and of the Father alone, and only a Son; but also because the manner of His Sonship is peculiar to Himself and not shared by bodies. And He is called the Word, because He is related to the Father as Word to Mind; not only on account of His passionless Generation, but also because of the Union, and of His declaratory function. Perhaps too this relation might be compared to that between the Definition and the Thing defined since this also is called Lo/goj. For, it says, he that has mental perception of the Son (for this is the meaning of Hath Seen) has also perceived the Father; and the Son is a concise demonstration and easy setting forth of the Father's Nature. For every thing that is begotten is a silent word of him that begot it. And if any one should say that this Name was given Him because
He exists in all things that are, he would not be wrong. For what is there that consists but by the word? He is also called Wisdom, as the Knowledge of things divine and human. For how is it possible that He Who made all things should be ignorant of the reasons of what He has made? And Power, as the Sustainer of all created things, and the Furnisher to them of power to keep themselves together. And Truth, as being in nature One and not many (for truth is one and falsehood is manifold), and as the pure Seal of the Father and His most unerring Impress. And the Image as of one substance with Him, and because He is of the Father, and not the Father of Him. For this is of the Nature of an Image, to be the reproduction of its Archetype, and of that whose name it bears; only that there is more here. For in ordinary language an image is a motionless representation of that which has motion; but in this case it is the living reproduction of the Living One, and is more exactly like than was Seth to Adam, or any son to his father. For such is the nature of simple Existences, that it is not correct to say of them that they are Like in one particular and Unlike in another; but they are a complete resemblance, and should rather be called Identical than Like. Moreover he is called Light as being the Brightness of souls cleansed by word and life. For if ignorance and sin be darkness, knowledge and a godly life will be Light.... And He is called Life, because He is Light, and is the constituting and creating Power of every reasonable soul. For in Him we live and move and have our being, according to the double power of that Breathing into us; for we were all inspired by Him with breath, and as many of us as were capable of it, and in so far as we open the mouth of our mind, with God the Holy Ghost. He is Righteousness, because He distributes according to that which we deserve, and is a righteous Arbiter both for those who are under the Law and for those who are under Grace, for soul and body, so that the former should rule, and the latter obey, and the higher have supremacy over the lower; that the worse may not rise in rebellion against the better. He is Sanctification, as being Purity, that the Pure may be contained by Purity. And Redemption, because He sets us free, who were held captive under sin, giving Himself a Ransom for us, the Sacrifice to make expiation for the world. And Resurrection, because He raises up from hence, and brings to life again us, who were slain by sin.
Source: Orations (New Advent)