What is meant by God does not change?
God is all powerful & mighty, who owns everything that is in the heavens and earth and no one can challenge his authority etc…
not change This could mean he does not change his appearance, essence, his attributes, his purpose and his decrees and needs no one.
I will limit the answer to a few examples to each including any conflicting passages to provide a good flavour as each issue has too many verses that could be used either way. It is more to establish if Jesus is God rather then clarify each heading.
God does not change
Num 23:19: God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good?
1 Samuel 15:29: And also the Strength of Israel will not lie nor repent: for he is not a man, that he should repent.
Malachi 3:6: For I am the LORD, I change not; therefore ye sons of Jacob are not consumed.
Psalm 102:26 They will perish, but you remain forever; they will wear out like old clothing. You will change them like a garment and discard them.
Romans 11:29 For the gifts and the calling of God are irrevocable.
Let’s examine JESUS
Obvious Jesus changed his appearance from a baby to a man. He was circumcised. Jesus had marks from the crucifixion, resurrection, no longer bound by the flesh etc…
Jesus was born from a woman, was a man, and was also called "son of man"
Born of Mary
Psalm 80:17 - Let your hand rest on the man at your right hand, the son of man you have raised up for yourself.
Matthew 26:24 - The Son of Man will go just as it is written about him. But woe to that man who betrays the Son of Man! It would be better for him if he had not been born."
John 5:30 - I can do nothing on my own. I judge as God tells me. Therefore, my judgment is just, because I carry out the will of the one who sent me, not my own will.
Hebrew 5:7 In the days of his flesh, Jesus offered up prayers and supplications, with loud cries and tears, to him who was able to save him from death, and he was heard because of his reverence.
John 7:16 So Jesus answered them, “My teaching is not mine, but his who sent me.
Mat 28:18 And Jesus came and said to them, “All authority in heaven and on earth has been given to me.
Change Message Mal 3:6 I change not
However, Jesus message changed – Jesus came down to die for our sins to be saved – OT & NT very different. Change the law, not bound by the law but live in the spirit, do not need to circumcise etc… Too numerous to mention.
Jeremiah 31:30 But everyone shall die for his own iniquity. Each man who eats sour grapes, his teeth shall be set on edge.
Deuteronomy 24:16 “Fathers shall not be put to death because of their children, nor shall children be put to death because of their fathers. Each one shall be put to death for his own sin.
Romans 7:8 But sin, seizing an opportunity through the commandment, produced in me all kinds of covetousness. For apart from the law, sin lies dead.
God is not weak & has all authority
James 1:13-15 13 When tempted, no one should say, “God is tempting me.” For God cannot be tempted by evil, nor does he tempt anyone; 14 but each person is tempted when they are dragged away by their own evil desire and enticed. 15 Then, after desire has conceived, it gives birth to sin; and sin, when it is full-grown, gives birth to death.
Slight problem with James passage is Gen 22:1 After these things God tested Abraham and said to him, “Abraham!” And he said, “Here I am.”
17 For this reason he had to be made like them, fully human in every way, in order that he might become a merciful and faithful high priest in service to God, and that he might make atonement for the sins of the people. 18 Because he himself suffered when he was tempted, he is able to help those who are being tempted.
Mark 1:12-13 12 At once the Spirit sent him out into the wilderness, 13 and he was in the wilderness forty days, being tempted by Satan. He was with the wild animals, and angels attended him.
Luke 4:5-6 5 The devil led him up to a high place and showed him in an instant all the kingdoms of the world. 6 And he said to him, “I will give you all their authority and splendor; it has been given to me, and I can give it to anyone I want to.
Hebrews 4:15 For we do not have a high priest who is unable to sympathize with our weaknesses, but one who in every respect has been tempted as we are, yet without sin.
God does not change, cannot be tempted, does not sin, is not weak, needs no one and does not change his mind by changing the law. Jesus clearly did change a number of factors, especially his appearance and resurrection for our sins. So based on the above Jesus cannot be God or you have a large number of contradictions.
Like some other passages they are taken out of context to forward a point of view.
For more information, see links below;
“equal with God" in John 5:18 - https://hermeneutics.stackexchange.com/a/69382/33268
2 Corinthians 13:11-14 ‘God is three equal Persons’ https://hermeneutics.stackexchange.com/a/55482/33268
John 8:58 ‘I am’ https://hermeneutics.stackexchange.com/a/60969/33268
John 1:1 https://hermeneutics.stackexchange.com/a/69491/33268