32. If heresy, in its folly and wickedness, shall attempt to entice the simple-minded and uninstructed away from the true belief that these words were spoken in reference to God the Son, by feigning that they are an utterance of God the Father concerning Himself, it shall hear sentence passed upon the lie by the Apostle and Teacher of the Gentiles. He interprets all these prophecies as allusions to the passion of the Lord and to the times of Gospel faith, when he is reproving the unbelief of Israel, which will not recognise that the Lord is come in the flesh. His words are:--For whosoever shall have called upon the name of the Lord shall be saved. How shall they call on Him in Whom they have not believed? But how shall they believe in Him of Whom they have not heard? And how shall they hear without a preacher? And how shall they preach, excerpt they have been sent? As it is written, How beautiful are the feet of them that proclaim peace, of them that proclaim good things. But all do not obey the Gospel. For Esaias saith, Lord, who hath believed our report? So then faith cometh by hearing and hearing through the word. But I say, Have they not heard? Yes verily, their sound went into all the earth, and their words unto the ends of the world. But I say, Did not Israel know? First Moses saith, I will provoke you to jealousy against them that are no people, and against a foolish nation I will anger you. Moreover Esaias is bold, and saith, I appeared unto them that seek Me not, I was found by them that asked not after Me. But to Israel what saith He? All day long I have stretched forth My hands to a people that hearken not [764] . Who art thou that hast mounted up through the successive heavens, knowing not whether thou wert in the body or out of the body, and canst explain more faithfully than he the words of the prophet? Who art thou that hast heard, and mayst not tell, the ineffable mysteries of the secret things of heaven, and hast proclaimed with greater assurance the knowledge granted thee by God for revelation? Who art thou that hast been fore-ordained to a full share of the Lord's suffering on the Cross, and first has been caught up to Paradise and drawn nobler teaching from the Scriptures of God than this chosen vessel? If there be such a man, has he been ignorant that these are the deeds and words of the true God, proclaimed to us by His own true and chosen Apostle that we may recognise in Him their Author?
33. But it may be argued that the Apostle was not inspired by the Spirit of prophecy when he borrowed these prophetic words; that he was only interpreting at random the words of another man, and though, no doubt, everything the Apostle says of himself comes to him by revelation from Christ, yet his knowledge of the words of Isaiah is only derived from the book. I answer that in the beginning of that utterance in which it is said that the servants of the true God shall bless Him and swear by Him, we read this adoration by the prophet:--From everlasting we have not heard, nor have our eyes seen God, except Thee, and Thy works which Thou wilt do for them that await Thy mercy [765] . Isaiah says that he has seen no God but Him. For he did actually see the glory of God, the mystery of Whose taking flesh from the Virgin he foretold. And if you, in your heresy, do not know that it was God the Only-begotten Whom the prophet saw in that glory, listen to the Evangelist:--These things said Esaias, when he saw His glory, and spake of Him [766] . The Apostle, the Evangelist, the Prophet combine to silence your objections. Isaiah did see God; even though it is written, No one hath seen God at any time, save the Only-begotten Son Who is in the bosom of the Father; He hath declared Him [767] , it was God Whom the prophet saw. He gazed upon the Divine glory, and men were filled with envy at such honour vouchsafed to his prophetic greatness. For this was the reason why the Jews passed sentence of death upon him.
34. Thus the Only-begotten Son, Who is in the bosom of the Father, has told us of God, Whom no man has seen. Either disprove the fact that the Son has thus informed us, or else believe Him Who has been seen, Who appeared to them who knew Him not, and became the God of the Gentiles who called not upon Him and spread out His hands before a gainsaying people. And believe this also concerning Him, that they who serve Him are called by a new name, and that on earth men bless Him and swear by Him as true God. Prophecy tells, the Gospel confirms, the Apostle explains, the Church confesses, that He Who was seen is true God; but none venture to say that God the Father was seen. And yet the madness of heresy has run to such lengths that, while they profess to recognise this truth, they really deny it. They deny it by means of the newfangled and godless device of evading the truth, while making a studied pretence of adhesion to it. For when they confess one God, alone true and alone righteous, alone wise, alone unchangeable, alone immortal, alone mighty, they attach to Him a Son different in substance, not born from God to be God, but adopted through creation to be a Son, having the name of God not by nature, but as a title received by adoption; and thus they inevitably deprive the Son of all those attributes which they accumulate upon the Father in His lonely majesty.
35. The distorted mind of heresy is incapable of knowing and confessing the One true God; the sound faith and reason necessary for such confession is incompatible with unbelief. We must confess Father and Son before we can apprehend God as One and true. When we have known the mysteries of man's salvation, accomplished in us through the power of regeneration unto life in the Father and the Son, then we may hope to penetrate the mysteries of the Law and the Prophets. Godless ignorance of the teaching of Evangelists and Apostles cannot frame the thought of One true God. Out of the teaching of Evangelists and Apostles we shall present the sound doctrine concerning Him, in accurate agreement with the faith of true believers. We shall present Him in such wise that the Only-begotten, Who is of the substance of the Father, shall be known as indivisible and inseparable in nature, not in Person. We shall set forth God as One, because God is from the nature of God. But we shall also establish this doctrine of the perfect unity of God upon the words of the Prophets, and make them the foundations of the Gospel structure, proving that there is One God, with one Divine nature, by the fact that God the Only-begotten is never classed apart as a second God. For throughout this book of our treatise we have followed the same course as in its predecessor; the same methods which proved there that the Son is God, have proved here that He is true God. I trust that our explanation of each passage has been so convincing that we have now manifested Him as true God as effectually as we formerly demonstrated His Godhead. The remainder of the book shall be devoted to the proof that He, Who is now recognised as true God, must not be regarded as a second God. Our disproof of the notion of a second God will further establish the unity; and this truth shall be displayed as not inconsistent with the personal existence of the Son, while yet it maintains the unity of nature in God and God.
36. The true method of our enquiry demands that we should begin with him, through whom God first manifested Himself to the world, that is, with Moses, by whose mouth God the Only-begotten thus declared Himself; See, see that I am God, and there is no God beside Me [768] . That godless heresy must not assign these words to God, the unbegotten Father, is clear by the sense of the passage and by the evidence of the Apostle who, as we have already stated [769] , has taught us to understand this whole discourse as spoken by God the Only-begotten. The Apostle also points out the words, Rejoice, O ye nations, with His people [770] as those of the Son, and in corroboration further cites this:--And there shall be a root of Jesse, and One that shall arise to rule the nations; in Him shall the nations trust [771] . Thus Moses by the words, Rejoice, O ye nations, with His people indicates Him Who said, There is no God beside Me; and the Apostle refers the same words to our Lord Jesus Christ, God the Only-begotten, in Whose rising as a king from the root of Jesse, according to the flesh, the hope of the Gentiles rests. And therefore we must now consider the meaning of these words, that we, who know that they were spoken by Him, may ascertain in what sense He spoke them.
37. That true and absolute and perfect doctrine, which forms our faith, is the confession of God from God and God in God, by no bodily process but by Divine power, by no transfusion from nature into nature but through the secret and mighty working of the One nature; God from God, not by division or extension or emanation, but by the operation of a nature which brings into existence, by means of birth, a nature One with itself. The facts shall receive a fuller treatment in the next book, which is to be devoted to an exposition of the teaching of the Evangelists and Apostles; for the present we must maintain our assertion and belief by means of the Law and the Prophets. The nature with which God is born is necessarily the same as that of His Source. He cannot come into existence as other than God, since His origin is from none other than God. His nature is the same, not in the sense that the Begetter also was begotten--for then the Unbegotten, having been begotten, would not be Himself--but that the substance of the Begotten consists in all those elements which are summed up in the substance of the Begetter, Who is His only Origin. Thus it is due to no external cause that His origin is from the One, and that His existence partakes the Unity; there is no novel element in Him, because His life is from the Living; no element absent, because the Living begot Him to partake His own life. Hence, in the generation of the Son, the incorporeal and unchangeable God begets, in accordance with His own nature, God incorporeal and unchangeable; and this perfect birth of incorporeal and unchangeable God from incorporeal and unchangeable God involves, as we see in the light of the revelation of God from God, no diminution of the Begetter's substance. And so God the Only-begotten bears witness through the holy Moses; See, see that I am God, and there is no God beside Me. For there is no second Divine nature, and so there can be no God beside Him, since He is God, yet by the powers of His nature God is also in Him. And because He is God and God is in Him, there is no God beside Him; for God, than Whom there is no other Source of Deity, is in Him, and consequently there is within Him not only His own existence, but the Author of that existence.
38. This saving faith which we profess is sustained by the spirit of prophecy, speaking with one voice through many mouths, and never, through long and changing ages, bearing an uncertain witness to the truths of revelation. For instance, the words which, as we are told through Moses, were spoken by God the Only-begotten, are confirmed for our better instruction by the prophetic spirit, speaking this time through those men of stature,--For God is in Thee, and there is no God beside Thee. Thou art God, and we knew it not, O God of Israel, the Saviour. Let heresy fling itself with its utmost effort of despair and rage against this declaration of a name and nature inseparably joined, and rend in twain, if its furious struggles can, a union perfect in title and in fact. God is in God and beside Him there is no God. Let heresy, if it can, divide the God within from the God within Whom He is, and classify, Each after His kind, the members of that mystic union. For when He says God is in Thee, He teaches that the true nature of God the Father is present in God the Son; for we must understand that it is the God Who is [772] that is in Him. And when He adds, And there is no God beside Thee, He shews that outside Him there is no God, since God's dwelling is within Himself. And the third assertion, Thou art God and we knew it not, sets forth for our instruction what must be the confession of the devout and believing soul. When it has learnt the mysteries of the Divine birth, and the name Emmanuel which the angel announced to Joseph, it must cry, Thou art God, and we knew it not, O God of Israel, the Saviour. It must recognise the subsistence of the Divine nature in Him, inasmuch as God is in God, and the nonexistence of any other God except the true. For, He being God and God being in Him, the delusion of another God, of what kind soever, must be surrendered. Such is the message of the prophet Isaiah; he bears witness to the indivisible and inseparable Godhead of Father and of Son.