The Old Testament, When Read Carefully, Supports the Trinity Far More Than the Oneness Doctrine

Does the Old Testament teach the Trinity? Yes — more clearly than it teaches Oneness. Read carefully, from Genesis to Malachi it shows one God who speaks of Himself as “Us,” sends the Messiah, pours out His Spirit, and calls the Son “God.” One God, revealing Himself as Father, Son, and Spirit from the very first page.

“I have not spoken in secret from the beginning; from the time that it was, there am I: and now the Lord GOD, and his Spirit, hath sent me.”— Isaiah 48:16

I keep seeing the same problem with Oneness believers. When they spot the word “one” or a phrase like “beside me there is no God,” they grab it instantly and claim victory without actually studying what the Bible says. That is not Bible study. That is word-snatching.

Here is why the Old Testament, if read carefully, supports the Trinity more than it supports the Oneness doctrine:

The Shema does not mean what they claim.

Deuteronomy 6:4 says, “Hear, O Israel: The LORD our God is one LORD.” The Hebrew word for “one” here is echad. Echad means one group, one team, one cluster. It is the same word used when Genesis 2:24 says a husband and wife become “one flesh.” They are not one person. They are two people who make up one unit.

If Moses had wanted to say God is absolutely, solitary, no-parts-to-it one, he would have used the word yachid. That means only, alone, unique. Moses did not use yachid. He used echad. That matters.

God speaks of Himself in plural.

Genesis 1:26 says, “And God said, Let us make man in our image, after our likeness.” The word for God there is Elohim. It is a plural noun, yet it takes a singular verb. That is unusual Hebrew grammar. God is speaking of Himself as “Us” and “Our” while remaining one Being. That fits the Trinity. It does not fit a single person playing three roles.

The Angel of the LORD is God, yet distinct from God.

He shows up all over the Old Testament, and He is not a created angel. He is God Himself.

In Genesis 16:13, Hagar sees the Angel of the LORD and calls Him “Thou God seest me.” In Genesis 22:11–12, the Angel of the LORD speaks to Abraham and says, “Lay not thine hand upon the lad, neither do thou any thing unto him: for now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son from me.” Then in verse 15, “the angel of the LORD called unto Abraham out of heaven the second time.” He speaks as God, and He speaks to God. That is two persons.

In Exodus 3:2, the Angel of the LORD appears in the burning bush. Then verse 4 says, “God called unto him out of the midst of the bush.” The Angel is God, yet God is also speaking from elsewhere. Two persons, one God.

In Judges 13:21–22, Manoah and his wife see the Angel of the LORD, and Manoah says, “We shall surely die, because we have seen God.” Again, the Angel is identified as God, yet distinct from the Father.

That is not a mode. That is a person.

The Messiah is sent by the LORD and anointed by the Spirit.

Isaiah 48:16 says, “Come ye near unto me, hear ye this; I have not spoken in secret from the beginning; from the time that it was, there am I: and now the Lord GOD, and his Spirit, hath sent me.” Three actors in one verse: the Speaker, the Lord GOD who sends Him, and the Spirit.

Isaiah 61:1 says, “The Spirit of the Lord GOD is upon me; because the LORD hath anointed me to preach good tidings unto the meek.” Jesus quotes this about Himself in Luke 4:18. The Spirit of the LORD is upon the Messiah. The LORD anoints the Messiah. Two distinct persons.

The Spirit of God is personal in the Old Testament.

Genesis 1:2 says, “The Spirit of God moved upon the face of the waters.” The Hebrew word is ruach. It means spirit, wind, breath. The Spirit is not an impersonal force here. He is hovering, acting, moving. A person acts. A force just exists.

Psalm 33:6 says, “By the word of the LORD were the heavens made; and all the host of them by the breath of his mouth.” The Word and the Spirit are both active in creation alongside the LORD.

“No God besides Me” proves monotheism, not modalism.

Oneness believers point to Isaiah 43:10 and 44:6 where God says, “I am the first, and I am the last; and beside me there is no God.” They say this proves there is only one person in the Godhead. But that is a double standard. Trinitarians believe there is one God. Those verses prove monotheism, not modalism. The question is not whether God is one. The question is how God is one.

Here is the contradiction in their own argument. They say the Father is the only God, and Jesus is just the Father in flesh. But then who is the Father talking to in Psalm 2:7 when He says, “Thou art my Son; this day have I begotten thee”? The Father is speaking to the Son.

In Psalm 110:1, the LORD said unto my Lord, “Sit thou at my right hand, until I make thine enemies thy footstool.” David calls the Messiah “Lord,” and the Father tells the Messiah to sit at His right hand. You cannot sit at your own right hand.

Hebrews 1:8 quotes Psalm 45:6 about the Son: “But unto the Son he saith, ‘Thy throne, O God, is for ever and ever.’” The Father calls the Son “God.” Two persons. Both God.

Zechariah 12:10 says, “They shall look upon me whom they have pierced.” It is the LORD speaking. The New Testament applies this to Jesus in John 19:37 and Revelation 1:7. The LORD is the one pierced. That is the Son. Yet the Father is still God. One God, two persons.

The problem is clear.

The Oneness approach sees the word “one” and stops reading. They do not ask what kind of one. They do not ask who is speaking to whom. They do not ask why God says “Us” and “Our.” They do not ask why the Angel of the LORD is called God yet distinct from God. They do not ask why the Spirit is personal in the Old Testament.

When you actually read the Old Testament with your eyes open, you see the Father, the Son, and the Spirit everywhere. You see one God, yes. But you see that one God revealing Himself as multiple persons from the very first page.

The Oneness doctrine forces you to ignore half the Bible to protect a word. The Trinity lets you take all of it seriously.

That is why I am not a Oneness believer — because the Scriptures are not either.

Continue the Oneness & the Trinity series