Jesus is God of the Old Testament, different versions of the Bible have various names for him such as Yahweh or Jehovah. The Bible doesn't give the name of God the Father, it pleased him to make Jesus the center of everything from creation to eternity. And, the Holy Spirit reveals Jesus to us, rather than himself.
“Jesus answered, “I tell you the truth, before Abraham was even born, I AM! ”
John 8:58 NLT
“God replied to Moses, “ I AM WHO I AM. Say this to the people of Israel: I AM has sent me to you.”
Exodus 3:14 NLT
“And God said to Moses, “I am Yahweh—‘the LORD.’ I appeared to Abraham, to Isaac, and to Jacob as El-Shaddai—‘God Almighty’ —but I did not reveal my name, Yahweh, to them.”
Exodus 6:2-3 NLT
Jesus told Noah to build the ark, instructed Abraham to leave his home and move to a far away land that is now called Israel, spoke to Moses from a burning bush, and said David is a man after his own heart. When Jesus came to earth as a man, he had three prominent tasks to complete. The foremost was to redeem mankind, but while walking earth, he was to reveal the Kingdom of God and the character of our Father.
Jesus has a heart that mirrors our Father's, they are so much alike, it was as though the Father himself was walking earth. Jesus revealed the Father to us by his own actions and personality, they are one in heart and purpose. As we diligently seek divine understanding and wisdom from God’s inspired Word, allowing the Spirit to build a new heart within, we step closer to being one with Jesus, and therefore, one with God.
“Jesus replied, “Have I been with you all this time, Philip, and yet you still don’t know who I am? Anyone who has seen me has seen the Father! So why are you asking me to show him to you?”
John 14:9 NLT
Jesus walked a life of integrity, honor, love, and faithfulness, more so than anyone else, perfectly representing our Father. He used parables to reveal the Kingdom when talking in public, but in private he explained things in more detail to his disciples. Then he redeemed mankind by sacrificing his own sinless human blood.
“For God made Christ, who never sinned, to be the offering for our sin, so that we could be made right with God through Christ.”
2 Corinthians 5:21 NLT
He was born of a virgin made pregnant by the Holy Spirit, therefore, he is God’s begotten Son. He was born spiritually alive, and never sinned even once, so the Holy Spirit was always with him. Jesus was the only person qualified to be the Messiah.
Even though he was born spiritually alive, and was God of the Old Testament, he was not born with knowledge of who he is. He was one of us, 100% human, and had to learn things like the rest of us. But, since he was born spiritually alive, the Holy Spirit was always with him, and Jesus learned at a young age to receive the Spirit's guidance and instruction.
“And the Spirit of the LORD will rest on him— the Spirit of wisdom and understanding, the Spirit of counsel and might, the Spirit of knowledge and the fear of the LORD. He will delight in obeying the LORD.”
Isaiah 11:2-3 NLT
Jesus spent much time learning Scriptures, this was evident at age twelve when the family made an annual journey to Jerusalem for the Passover Feast. He was a responsible boy, so on the journey back his parents weren't concerned that he wasn't with them, assuming he was with friends who accompanied them on the journey.
When evening came and he still wasn't with them, they became concerned and started searching. Three days later they found him back at Jerusalem in the Temple. He had been listening to religious leaders, asking many questions. They were all amazed at his ability to understand, and he was even able to teach them some things.
His parents asked how he could do this, causing them to be frantically searching for him all this time. He said, "But why did you need to search? Didn’t you know that I must be in my Father’s house?” (Luke 2:49 NLT)
This following excerpt confirms Jesus was in heaven before coming to earth as a man. When it says he gave up his divine privileges, this reveals he stepped out of glorious spiritual existence, and into physical existence. As flesh and blood, he sacrificed his human blood to become Redeemer of mankind, then God returned him to glory in heaven. He is now the King of kings and Lord of lords.
“Though he was God, he did not think of equality with God as something to cling to. Instead, he gave up his divine privileges; he took the humble position of a slave and was born as a human being. When he appeared in human form, he humbled himself in obedience to God and died a criminal’s death on a cross.
Therefore, God elevated him to the place of highest honor and gave him the name above all other names, that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, and every tongue declare that Jesus Christ is Lord, to the glory of God the Father.”
Phi 2:6-11 NLT
While on the cross, the Holy Spirit left him, and he said, "My God, why have you left me"? When the Spirit left him at a time when needed the most, he apparently wasn't expecting the separation, leaving him alone to endure Crucifixion. Because of the separation, he personally endured the pain and humiliation of everyone’s sins, he was paying the price for our redemption.
Just before dying he said, "it is finished", then and at the moment of his death, the New Covenant was activated. Now, animal sacrifices are obsolete, the sacrifice of Jesus was the final sacrifice that will ever be needed.
“We can boldly enter heaven’s Most Holy Place because of the blood of Jesus. By his death, Jesus opened a new and life-giving way through the curtain into the Most Holy Place. And since we have a great High Priest who rules over God’s house, let us go right into the presence of God with sincere hearts fully trusting him. For our guilty consciences have been sprinkled with Christ’s blood to make us clean, and our bodies have been washed with pure water.”
Hebrews 10:19-22 NLT
Who Is Jesus 2 - After Crucifixion