Many people believe that the God of the Old Testament was the Father.  They believe that God the Father spoke to Adam and Eve in the Garden of Eden; that the Father punished Sodom and Gomorrah, and that the Father gave the Ten Commandments and dealt with ancient Israel.

But is this right?  There are some Scriptures which clearly show that Jesus Christ was the God of the Old Testament. 

1^st Proof) No one has seen the Father

Christ said that no has ever seen the Father at any time, (except the Son). 

John 1:18  No one has seen God at any time. The only begotten Son, who is in the bosom of the Father, He has declared Him.

Jesus made a similar statement in John 6:46 

John 6:46  “Not that anyone has seen the Father, except He who is from God; He has seen the Father.

Who did Adam and Eve see in the Garden of Eden? In Gen 3:8 it says:

Gen 3:8  And they heard the sound of the LORD God walking in the garden in the cool of the day, and Adam and his wife hid themselves from the presence of the LORD God among the trees of the garden.

God was walking in the garden.  Adam and Eve saw God.  If they couldn’t see Him then why would they hide from His presence?  But who was walking in the garden?  It cannot have been the Father because as John 1:18 says, no one has seen God at any time.  It must have been Jesus Christ.

Who did Moses see when God put him a cleft of a rock and passed by so that Moses saw His back?  We read about that in Exodus 33:18-23 where Moses asked God to show him His glory.

Exo 33:18  And he said, “Please, show me Your glory.”
Exo 33:19  Then He said, “I will make all My goodness pass before you, and I will proclaim the name of the LORD before you. I will be gracious to whom I will be gracious, and I will have compassion on whom I will have compassion.”
Exo 33:20  But He said, “You cannot see My face; for no man shall see Me, and live.”
Exo 33:21  And the LORD said, “Here is a place by Me, and you shall stand on the rock.
Exo 33:22  So it shall be, while My glory passes by, that I will put you in the cleft of the rock, and will cover you with My hand while I pass by.
Exo 33:23  Then I will take away My hand, and you shall see My back; but My face shall not be seen.”

Who did Moses see?  It cannot have been the Father because no one has ever seen the Father at any time. It must have been Jesus Christ.

This shows it was Jesus Christ who dealt with Adam and Eve.  It was Jesus Christ who dealt with Moses.  It was Jesus Christ who was the God of the Old Testament.

2^nd Proof) Jesus Christ does the judging, not the Father

Throughout the Old Testament we read how God has judged mankind.  For example: Noah’s flood, Sodom and Gomorrah, Ninevah, and of course when God judged the houses of ancient Israel and Judah and sent them into captivity. 

When Abraham was bargaining with God over how many righteous people it would take for God not to destroy Sodom and Gomorrah, Abraham said:

Gen 18:25  … “Shall not the Judge of all the earth do right?”

Abraham was talking to the divine being who was the Judge of all the earth.  The devinebeing was judging Sodom and Gomorrah.  Yet Christ Himself said in John 5:22, that’s John 5:22:

John 5:22  “For the Father judges no one, but has committed all judgment to the Son,

The Father judges no one.  So which divine being was doing the judging in the Old Testament?  It cannot have been the Father so it must have been Jesus Christ.  It was Jesus Christ who was the God of the Old Testament.

3^rd Proof) Jesus was the “I AM” who appeared to Moses

In John 8:56 Jesus addressed the topic of who He was.

John 8:56  “Your father Abraham rejoiced to see My day, and he saw it and was glad.”

The “seeing” here means seeing with the eyes.  The Jews clearly understood this to mean that Abraham had seen him with his eyes, which is why they followed up with their next question. 

John 8:57  Then the Jews said to Him, “You are not yet fifty years old, and have You seen Abraham?”

The Jews were saying in effect, you cannot have seen Abraham because you are not old enough.  Jesus in the next verse explained how it was He saw Abraham – not by being a very old human, but by being God.

John 8:58  Jesus said to them, “Most assuredly, I say to you, before Abraham was, I AM.”

The Jews understood “I AM” as a title of God.  That is how God described Himself to Moses. 

Exo 3:14  And God said to Moses, “I AM WHO I AM.” And He said, “Thus you shall say to the children of Israel, ‘I AM has sent me to you.'”

Jesus said He was the same divine being who revealed Himself to Moses as “I AM”.  What was the response of the Jews?

John 8:59  Then they took up stones to throw at Him…

The Jews took up stones to kill Jesus because they didn’t believe His claims; they thought He was blaspheming.

Jesus stated two things.  Firstly, that He was God; and secondly that He was the one who dealt with Moses and ancient Israel.  In other words, Jesus is telling us here that He was the God of the Old Testament.

4^th Proof) Jesus was the Rock of the Old Testament

The apostle Paul in talking about the ancient Israelites who came out of Egypt said that they drank of the spiritual Rock which was Christ.

1 Cor 10:1  Moreover, brethren, I do not want you to be unaware that all our fathers were under the cloud, all passed through the sea,
1 Cor 10:2  all were baptized into Moses in the cloud and in the sea,
1 Cor 10:3  all ate the same spiritual food,
1 Cor 10:4  and all drank the same spiritual drink. For they drank of that spiritual Rock that followed them, and that Rock was Christ.

What is Paul saying here?  He is saying that the divine being who dealt with ancient Israel was Jesus Christ.  In other words, that Jesus was the God of the Old Testament.