First of all, could God be a man?
Yes, he could but he won't.
Numbers 23:19 New King James Version (NKJV)
“God is not a man, that He should lie,
Nor a son of man, that He should repent.
Has He said, and will He not do?
Or has He spoken, and will He not make it good?
He already said it during the time of Moses:
- God is not a man nor a son of man
- He does not lie
- If he said it, he will make it good
Secondly, is our Lord Jesus Christ a man?
John 8:40-45 New King James Version (NKJV)
But now you seek to kill Me,
a Man who has told you the truth which I heard from God. Abraham did not do this. You do the deeds of your father.”
Then they said to Him, “We were not born of fornication; we have one Father—God.”
Jesus said to them, “If God were your Father, you would love Me, for
I proceeded forth and came from God;
nor have I come of Myself, but He sent Me.
Why do you not understand My speech? Because you are not able to listen to My word. You are of your father the devil, and the desires of your father you want to do. He was a murderer from the beginning, and does not stand in the truth, because there is no truth in him. When he speaks a lie, he speaks from his own resources, for he is a liar and the father of it.
But because I tell the truth, you do not believe Me.
What did Jesus said?
- I am a Man
- A man who heard the truth from God
- I came from God
- God sent me
- Those who can't understand him, belongs to the devil
- I am telling the truth
Conclusion: Jesus is truly man and he is not God.