Just before his death, Jesus asked:
Mat 27:46 KJV And about the ninth hour Jesus cried with a loud voice, saying, Eli, Eli, lama sabachthani? that is to say, My God, my God, why hast thou forsaken me?
Did God really forsake Jesus just as he was giving his life as a sacrifice for the sins of the world? Does this verse prove a separation between the Father and the Son? Did God leave Jesus on the cross just before he died? Did the Father separate Himself from the Son?
Some have said that the Spirit of God left Jesus. This is not possible because Jesus is God manifest in flesh.
1Ti 3:16 KJV And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.
Others have said that the Father left the Son. This would either mean that they are separate entities or that the Deity came out of the humanity and left the man Christ alone on the cross. The Scriptures tell us that God was in Christ during reconciliation.
2Co 5:19 KJV To wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation.
God did not forsake Jesus when he was on the cross because Jesus was God. Jesus was God manifest in flesh to become the sacrifice for our sins. This does not mean that the Father suffered the pain of death because God is a Spirit and cannot die.
I have heard some say that God died on the cross. Jesus did not die as God. Jesus died as a man. If God could die in His deity He would not be God.
The Spirit of God did not leave the body of Jesus and allow him to die on the cross alone. It was not one person within the Godhead forsaking another person within the Godhead. This would have required each person to be a separate individual, either making each one 1/3 of God, or making three Gods. God could not have separated Himself from Jesus because Jesus was God.
Jesus took upon himself the sins of the world. For the first time, Jesus, a sinless man, felt what it was like to feel the judgment of God for sin. He felt sinful. He felt forsaken. Jesus did not sin, but he did feel the sins of the world. He took our place and felt our sin.
We have all sinned.
Rom 3:23 KJV For all have sinned, and come short of the glory of God;
The penalty for sin is death.
Rom 6:23 KJV For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.
Jesus took our place and suffered the death that we deserve for sin.
Rom 5:6-9 KJV 6 For when we were yet without strength, in due time Christ died for the ungodly. 7 For scarcely for a righteous man will one die: yet peradventure for a good man some would even dare to die. 8 But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us. 9 Much more then, being now justified by his blood, we shall be saved from wrath through him.
Jesus, as a sinless man, freely took upon himself the sins of the world. He felt the judgment for sin so we don’t have to. Jesus died on the cross so we could have the free gift of salvation by the grace of God. He provided a way for salvation by buying it with his own blood.