Socinians, Unitarians, and certain other heretical sects argue that the Son of God, the Lord Jesus Christ, is only a man, and that He neither personally substantially existed prior to the birth of the man Jesus Christ, and that He does not have a divine nature at all, but only a human one. Such a view is one of the earliest heresies the church faced; so early in fact, under the name of the Ebionites, that the Gospel of John may have been been partly intended by the apostle to combat it; hence the great emphasis on the pre-existence, eternality, and divinity of the Son in the Gospel of John.
Such a view of Christ is obviously unbiblical, and this can be sufficiently noted from the pages of the New Testament alone. But the Old Testament as well is full of testimonies to these truths- more so even than the New, perhaps. One of the most common ways we see the Son of God in the Old Testament, prior to His incarnation, is in His role as the Angel (or Messenger, as the Hebrew and Greek words for “Angel” literally mean) of the Lord.
The Angel of the Lord is mentioned many times throughout the Old Testament, and is distinguished from created angels (as “the” Angel, rather than “an” angel). In this role we see the Son of God, even before the incarnation, ministering to His Father’s will, and frequently bringing the words of God to the saints of the Old Testament (just as He did in the incarnation, in the New Testament). Acting as a Messenger and mouthpiece, so to speak, for His Father, He spoke sometime in His own person, and sometimes in the person of the Father, to the saints of old.
We see this throughout the Old Testament, as the Angel of the Lord interacted with Abraham, Jacob, Moses, and many others. Second century church father Justin Martyr, in his Dialogue With Trypho, does an excellent job of detailing several of these interactions and demonstrating that the Angel of the Lord is indeed the divine Son of God. Since he does a fine job of this, I see no value in attempting to do the same thing from scratch; so here are the relevant sections from Justin Martyr’s Dialogue With Trypho:
““Moses, then, the blessed and faithful servant of God, declares that He who appeared to Abraham under the oak in Mamre is God, sent with the two angels in His company to judge Sodom by Another who remains ever in the supercelestial places, invisible to all men, holding personal intercourse with none, whom we believe to be Maker and Father of all things; for he speaks thus: ‘God appeared to him under the oak in Mamre, as he sat at his tent-door at noontide. And lifting up his eyes, he saw, and behold, three men stood before him; and when he saw them, he ran to meet them from the door of his tent; and he bowed himself toward the ground, and said;’ ”2125 (and so on;)2126 “ ‘Abraham gat up early in the morning to the place where he stood before the Lord: and he looked toward Sodom and Gomorrah, and toward the adjacent country, and beheld, and, lo, a flame went up from the earth, like the smoke of a furnace.’ ” And when I had made an end of quoting these words, I asked them if they had understood them.
And they said they had understood them, but that the passages adduced brought forward no proof that there is any other God or Lord, or that the Holy Spirit says so, besides the Maker of all things.
Then I replied, “I shall attempt to persuade you, since you have understood the Scriptures, [of the truth] of what I say, that there is, and that there is said to be, another God and Lord subject to2127 the Maker of all things; who is also called an Angel, because He announces to men whatsoever the Maker of all things—above whom there is no other God—wishes to announce to them.” And quoting once more the previous passage, I asked Trypho, “Do you think that God appeared to Abraham under the oak in Mamre, as the Scripture asserts?”
He said, “Assuredly.”
“Was He one of those three,” I said, “whom Abraham saw, and whom the Holy Spirit of prophecy describes as men?”
He said, “No; but God appeared to him, before the vision of the three. Then those three whom the Scripture calls men, were angels; two of them sent to destroy Sodom, and one to announce the joyful tidings to Sarah, that she would bear a son; for which cause he was sent, and having accomplished his errand, went away.”2128
“How then,” said I, “does the one of the three, who was in the tent, and who said, ‘I shall return to thee hereafter, and Sarah shall have a son,’2129 appear to have returned when Sarah had begotten a son, and to be there declared, by the prophetic word, God? But that you may clearly discern what I say, listen to the words expressly employed by Moses; they are these: ‘And Sarah saw the son of Hagar the Egyptian bond-woman, whom she bore to Abraham, sporting with Isaac her son, and said to Abraham, Cast out this bond-woman and her son; for the son of this bond-woman shall not share the inheritance of my son Isaac. And the matter seemed very grievous in Abraham’s sight, because of his son. But God said to Abraham, Let it not be grievous in thy sight because of the son, and because of the bond-woman. In all that Sarah hath said unto thee, hearken to her voice; for in Isaac shall thy seed be called.’2130 Have you perceived, then, that He who said under the oak that He would return, since He knew it would be necessary to advise Abraham to do what Sarah wished him, came back as it is written; and is God, as the words declare, when they so speak: ‘God said to Abraham, Let it not be grievous in thy sight because of the son, and because of the bond-woman?’ ” I inquired. And Trypho said, “Certainly; but you have not proved from this that there is another God besides Him who appeared to Abraham, and who also appeared to the other patriarchs and prophets. You have proved, however, that we were wrong in believing that the three who were in the tent with Abraham were all angels.”
I replied again, “If I could not have proved to you from the Scriptures that one of those three is God, and is called Angel,2131 because, as I already said, He brings messages to those to whom God the Maker of all things wishes [messages to be brought], then in regard to Him who appeared to Abraham on earth in human form in like manner as the two angels who came with Him, and who was God even before the creation of the world, it were reasonable for you to entertain the same belief as is entertained by the whole of your nation.”
“Assuredly,” he said, “for up to this moment this has been our belief.”
Then I replied, “Reverting to the Scriptures, I shall endeavour to persuade you, that He who is said to have appeared to Abraham, and to Jacob, and to Moses, and who is called God, is distinct from Him who made all things,—numerically, I mean, not [distinct] in will. For I affirm that He has never at any time done2132 anything 224which He who made the world—above whom there is no other God—has not wished Him both to do and to engage Himself with.”
And Trypho said, “Prove now that this is the case, that we also may agree with you. For we do not understand you to affirm that He has done or said anything contrary to the will of the Maker of all things.”
Then I said, “The Scripture just quoted by me will make this plain to you. It is thus: ‘The sun was risen on the earth, and Lot entered into Segor (Zoar); and the Lord rained on Sodom sulphur and fire from the Lord out of heaven, and overthrew these cities and all the neighbourhood.’ ”2133
Then the fourth of those who had remained with Trypho said, “It2134 must therefore necessarily be said that one of the two angels who went to Sodom, and is named by Moses in the Scripture Lord, is different from Him who also is God, and appeared to Abraham.”2135
“It is not on this ground solely,” I said, “that it must be admitted absolutely that some other one is called Lord by the Holy Spirit besides Him who is considered Maker of all things; not solely [for what is said] by Moses, but also [for what is said] by David. For there is written by him: ‘The Lord says to my Lord, Sit on My right hand, until I make Thine enemies Thy footstool,’2136 as I have already quoted. And again, in other words: ‘Thy throne, O God, is for ever and ever. A sceptre of equity is the sceptre of Thy kingdom: Thou hast loved righteousness and hated iniquity: therefore God, even Thy God, hath anointed Thee with the oil of gladness above Thy fellows.’2137 If, therefore, you assert that the Holy Spirit calls some other one God and Lord, besides the Father of all things and His Christ, answer me; for I undertake to prove to you from Scriptures themselves, that He whom the Scripture calls Lord is not one of the two angels that went to Sodom, but He who was with them, and is called God, that appeared to Abraham.”
And Trypho said, “Prove this; for, as you see, the day advances, and we are not prepared for such perilous replies; since never yet have we heard any man investigating, or searching into, or proving these matters; nor would we have tolerated your conversation, had you not referred everything to the Scriptures:2138 for you are very zealous in adducing proofs from them; and you are of opinion that there is no God above the Maker of all things.”
Then I replied, “You are aware, then, that the Scripture says, ‘And the Lord said to Abraham, Why did Sarah laugh, saying, Shall I truly conceive? for I am old. Is anything impossible with God? At the time appointed shall I return to thee according to the time of life, and Sarah shall have a son.’2139 And after a little interval: ‘And the men rose up from thence, and looked towards Sodom and Gomorrah; and Abraham went with them, to bring them on the way. And the Lord said, I will not conceal from Abraham, my servant, what I do.’2140 And again, after a little, it thus says: ‘The Lord said, The cry of Sodom and Gomorrah is great,2141 and their sins are very grievous. I will go down now, and see whether they have done altogether according to their cry which has come unto me; and if not, that I may know. And the men turned away thence, and went to Sodom. But Abraham was standing before the Lord; and Abraham drew near, and said, Wilt Thou destroy the righteous with the wicked?’ ”2142 (and so on,2143 for I do not think fit to write over again the same words, having written them all before, but shall of necessity give those by which I established the proof to Trypho and his companions. Then I proceeded to what follows, in which these words are recorded:) “ ‘And the Lord went His way as soon as He had left communing with Abraham; and [Abraham] went to his place. And there came two angels to Sodom at even. And Lot sat in the gate of Sodom;’2144 and what follows until, ‘But the men put forth their hands, and pulled Lot into the house to them, and shut to the door of the house;’2145 and what follows till, ‘And the angels laid hold on his hand, and on the hand of his wife, and on the hands of his daughters, the Lord being merciful to him. And it came to pass, when they had brought them forth abroad, that they said, Save, save thy life. Look not behind thee, nor stay in all the neighbourhood; escape to the mountain, lest thou be taken along with [them]. And Lot said to them, I beseech [Thee], O Lord, since Thy servant hath found grace in Thy sight, and Thou hast magnified Thy righteousness, which Thou showest towards me in saving my life; but I cannot escape to the mountain, lest evil overtake me, and I die. Behold, this city is near to flee unto, and it is small: there I shall be safe, since it is small; and any soul shall live. And He said to him, Behold, I have accepted thee2146 also in this matter, 225so as not to destroy the city for which thou hast spoken. Make haste to save thyself there; for I shall not do anything till thou be come thither. Therefore he called the name of the city Segor (Zoar). The sun was risen upon the earth; and Lot entered into Segor (Zoar). And the Lord rained on Sodom and Gomorrah sulphur and fire from the Lord out of heaven; and He overthrew these cities, and all the neighbourhood.’ ”2147 And after another pause I added: “And now have you not perceived, my friends, that one of the three, who is both God and Lord, and ministers to Him who is in the heavens, is Lord of the two angels? For when [the angels] proceeded to Sodom, He remained behind, and communed with Abraham in the words recorded by Moses; and when He departed after the conversation, Abraham went back to his place. And when he came [to Sodom], the two angels no longer conversed with Lot, but Himself, as the Scripture makes evident; and He is the Lord who received commission from the Lord who [remains] in the heavens, i.e., the Maker of all things, to inflict upon Sodom and Gomorrah the [judgments] which the Scripture describes in these terms: ‘The Lord rained down upon Sodom and Gomorrah sulphur and fire from the Lord out of heaven.’ ”
Then Trypho said when I was silent, “That Scripture compels us to admit this, is manifest; but there is a matter about which we are deservedly at a loss —namely, about what was said to the effect that [the Lord] ate what was prepared and placed before him by Abraham; and you would admit this.”
I answered, “It is written that they ate; and if we believe2148 that it is said the three ate, and not the two alone—who were really angels, and are nourished in the heavens, as is evident to us, even though they are not nourished by food similar to that which mortals use—(for, concerning the sustenance of manna which supported your fathers in the desert, Scripture speaks thus, that they ate angels’ food): [if we believe that three ate], then I would say that the Scripture which affirms they ate bears the same meaning as when we would say about fire that it has devoured all things; yet it is not certainly understood that they ate, masticating with teeth and jaws. So that not even here should we be at a loss about anything, if we are acquainted even slightly with figurative modes of expression, and able to rise above them.”
And Trypho said, “It is possible that [the question] about the mode of eating may be thus explained: [the mode, that is to say,] in which it is written, they took and ate what had been prepared by Abraham: so that you may now proceed to explain to us how this God who appeared to Abraham, and is minister to God the Maker of all things, being born of the Virgin, became man, of like passions with all, as you said previously.”
Then I replied, “Permit me first, Trypho, to collect some other proofs on this head, so that you, by the large number of them, may be persuaded of [the truth of] it, and thereafter I shall explain what you ask.”
And he said, “Do as seems good to you; for I shall be thoroughly pleased.”
Then I continued, “I purpose to quote to you Scriptures, not that I am anxious to make merely an artful display of words; for I possess no such faculty, but God’s grace alone has been granted to me to the understanding of His Scriptures, of which grace I exhort all to become partakers freely and bounteously, in order that they may not, through want of it,2149 incur condemnation in the judgment which God the Maker of all things shall hold through my Lord Jesus Christ.”
And Trypho said, “What you do is worthy of the worship of God; but you appear to me to feign ignorance when you say that you do not possess a store of artful words.”
I again replied, “Be it so, since you think so; yet I am persuaded that I speak the truth.2150 But give me your attention, that I may now rather adduce the remaining proofs.”
“Proceed,” said he.
And I continued: “It is again written by Moses, my brethren, that He who is called God and appeared to the patriarchs is called both Angel and Lord, in order that from this you may understand Him to be minister to the Father of all things, as you have already admitted, and may remain firm, persuaded by additional arguments. The word of God, therefore, [recorded] by Moses, when referring to Jacob the grandson of Abraham, speaks thus: ‘And it came to pass, when the sheep conceived, that I saw them with my eyes in the dream: And, behold, the he-goats and the rams which leaped upon the sheep and she-goats were spotted 226with white, and speckled and sprinkled with a dun colour. And the Angel of God said to me in the dream, Jacob, Jacob. And I said, What is it, Lord? And He said, Lift up thine eyes, and see that the he-goats and rams leaping on the sheep and she-goats are spotted with white, speckled, and sprinkled with a dun colour. For I have seen what Laban doeth unto thee. I am the God who appeared to thee in Bethel,2151 where thou anointedst a pillar and vowedst a vow unto Me. Now therefore arise, and get thee out of this land, and depart to the land of thy birth, and I shall be with thee.’2152 And again, in other words, speaking of the same Jacob, it thus says: ‘And having risen up that night, he took the two wives, and the two women-servants, and his eleven children, and passed over the ford Jabbok; and he took them and went over the brook, and sent over all his belongings. But Jacob was left behind alone, and an Angel2153 wrestled with him until morning. And He saw that He is not prevailing against him, and He touched the broad part of his thigh; and the broad part of Jacob’s thigh grew stiff while he wrestled with Him. And He said, Let Me go, for the day breaketh. But he said, I will not let Thee go, except Thou bless me. And He said to him, What is thy name? And he said, Jacob. And He said, Thy name shall be called no more Jacob, but Israel shall be thy name; for thou hast prevailed with God, and with men shalt be powerful. And Jacob asked Him, and said, Tell me Thy name. But he said, Why dost thou ask after My name? And He blessed him there. And Jacob called the name of that place Peniel,2154 for I saw God face to face, and my soul rejoiced.’2155 And again, in other terms, referring to the same Jacob, it says the following: ‘And Jacob came to Luz, in the land of Canaan, which is Bethel, he and all the people that were with him. And there he built an altar, and called the name of that place Bethel; for there God appeared to him when he fled from the face of his brother Esau. And Deborah, Rebekah’s nurse, died, and was buried beneath Bethel under an oak: and Jacob called the name of it The Oak of Sorrow. And God appeared again to Jacob in Luz, when he came out from Mesopotamia in Syria, and He blessed him. And God said to him, Thy name shall be no more called Jacob, but Israel shall be thy name.’2156 He is called God, and He is and shall be God.” And when all had agreed on these grounds, I continued: “Moreover, I consider it necessary to repeat to you the words which narrate how He who is both Angel and God and Lord, and who appeared as a man to Abraham, and who wrestled in human form with Jacob, was seen by him when he fled from his brother Esau. They are as follows: ‘And Jacob went out from the well of the oath,2157 and went toward Charran.2158 And he lighted on a spot, and slept there, for the sun was set; and he gathered of the stones of the place, and put them under his head. And he slept in that place; and he dreamed, and, behold, a ladder was set up on the earth, whose top reached to heaven; and the angels of God ascended and descended upon it. And the Lord stood2159 above it, and He said, I am the Lord, the God of Abraham thy father, and of Isaac; be not afraid: the land whereon thou liest, to thee will I give it, and to thy seed; and thy seed shall be as the dust of the earth, and shall be extended to the west, and south, and north, and east: and in thee, and in thy seed, shall all families of the earth be blessed. And, behold, I am with thee, keeping thee in every way wherein thou goest, and will bring thee again into this land; for I will not leave thee, until I have done all that I have spoken to thee of. And Jacob awaked out of his sleep, and said, Surely the Lord is in this place, and I knew it not. And he was afraid, and said, How dreadful is this place! this is none other than the house of God, and this is the gate of heaven. And Jacob rose up in the morning, and took the stone which he had placed under his head, and he set it up for a pillar, and poured oil upon the top of it; and Jacob called the name of the place The House of God, and the name of the city formerly was Ulammaus.’ ”2160
When I had spoken these words, I continued: “Permit me, further, to show you from the book of Exodus how this same One, who is both Angel, and God, and Lord, and man, and who appeared in human form to Abraham and Isaac,2161 appeared in a flame of fire from the bush, and conversed with Moses.” And after they said they would listen cheerfully, patiently, and eagerly, I went on: “These words are in the book which bears the title of Exodus: ‘And after many days the king of Egypt died, and the children of Israel groaned by reason of the works;’2162and so on until, ‘Go and gather the elders of Israel, and thou shalt say unto them, The Lord God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, hath appeared to me, saying, I am surely beholding you, and the things which have befallen you in Egypt.’ ”2163 In addition to these words, I went on: “Have you perceived, sirs, that this very God whom Moses speaks of as an Angel that talked to him in the flame of fire, declares to 227Moses that He is the God of Abraham, of Isaac, and of Jacob?”
Then Trypho said, “We do not perceive this from the passage quoted by you, but [only this], that it was an angel who appeared in the flame of fire, but God who conversed with Moses; so that there were really two persons in company with each other, an angel and God, that appeared in that vision.”
I again replied, “Even if this were so, my friends, that an angel and God were together in the vision seen by Moses, yet, as has already been proved to you by the passages previously quoted, it will not be the Creator of all things that is the God that said to Moses that He was the God of Abraham, and the God of Isaac, and the God of Jacob, but it will be He who has been proved to you to have appeared to Abraham, ministering to the will of the Maker of all things, and likewise carrying into execution His counsel in the judgment of Sodom; so that, even though it be as you say, that there were two—an angel and God—he who has but the smallest intelligence will not venture to assert that the Maker and Father of all things, having left all supercelestial matters, was visible on a little portion of the earth.”
And Trypho said, “Since it has been previously proved that He who is called God and Lord, and appeared to Abraham, received from the Lord, who is in the heavens, that which He inflicted on the land of Sodom, even although an angel had accompanied the God who appeared to Moses, we shall perceive that the God who communed with Moses from the bush was not the Maker of all things, but He who has been shown to have manifested Himself to Abraham and to Isaac and to Jacob; who also is called and is perceived to be the Angel of God the Maker of all things, because He publishes to men the commands of the Father and Maker of all things.”
And I replied, “Now assuredly, Trypho, I shall show that, in the vision of Moses, this same One alone who is called an Angel, and who is God, appeared to and communed with Moses. For the Scripture says thus: ‘The Angel of the Lord appeared to him in a flame of fire from the bush; and he sees that the bush burns with fire, but the bush was not consumed. And Moses said, I will turn aside and see this great sight, for the bush is not burnt. And when the Lord saw that he is turning aside to behold, the Lord called to him out of the bush.’2164 In the same manner, therefore, in which the Scripture calls Him who appeared to Jacob in the dream an Angel, then [says] that the same Angel who appeared in the dream spoke to him,2165 saying, ‘I am the God that appeared to thee when thou didst flee from the face of Esau thy brother;’ and [again] says that, in the judgment which befell Sodom in the days of Abraham, the Lord had inflicted the punishment2166 of the Lord who [dwells] in the heavens;—even so here, the Scripture, in announcing that the Angel of the Lord appeared to Moses, and in afterwards declaring him to be Lord and God, speaks of the same One, whom it declares by the many testimonies already quoted to be minister to God, who is above the world, above whom there is no other [God].
“I shall give you another testimony, my friends,” said I, “from the Scriptures, that God begat before all creatures a Beginning,2167 [who was] a certain rational power [proceeding] from Himself, who is called by the Holy Spirit, now the Glory of the Lord, now the Son, again Wisdom, again an Angel, then God, and then Lord and Logos; and on another occasion He calls Himself Captain, when He appeared in human form to Joshua the son of Nave (Nun). For He can be called by all those names, since He ministers to the Father’s will, and since He was begotten of the Father by an act of will;2168 just as we see2169 happening among ourselves: for when we give out some word, we beget the word; yet not by abscission, so as to lessen the word2170 [which remains] in us, when we give it out: and just as we see also happening in the case of a fire, which is not lessened when it has kindled [another], but remains the same; and that which has been kindled by it likewise appears to exist by itself, not diminishing that from which it was kindled. The Word of Wisdom, who is Himself this God begotten of the Father of all things, and Word, and Wisdom, and Power, and the Glory of the Begetter, will bear evidence to me, when He speaks by Solomon the following: ‘If I shall declare to you what happens daily, I shall call to mind events from everlasting, and review them. The Lord made me the 228beginning of His ways for His works. From everlasting He established me in the beginning, before He had made the earth, and before He had made the deeps, before the springs of the waters had issued forth, before the mountains had been established. Before all the hills He begets me. God made the country, and the desert, and the highest inhabited places under the sky. When He made ready the heavens, I was along with Him, and when He set up His throne on the winds: when He made the high clouds strong, and the springs of the deep safe, when He made the foundations of the earth, I was with Him arranging. I was that in which He rejoiced; daily and at all times I delighted in His countenance, because He delighted in the finishing of the habitable world, and delighted in the sons of men. Now, therefore, O son, hear me. Blessed is the man who shall listen to me, and the mortal who shall keep my ways, watching2171 daily at my doors, observing the posts of my ingoings. For my outgoings are the outgoings of life, and [my] will has been prepared by the Lord. But they who sin against me, trespass against their own souls; and they who hate me love death.’2172“(Chapter 56-61, from https://www.ccel.org/ccel/schaff/anf01)