You say, “So he couldn’t use an angel?” No, because no angel is God. An angel could not pay the debt of mankind’s sin. Nor could an angel bridge the ontological gap between God and man. The Incarnation is not about “trust.” It’s about who is capable of bearing infinite justice and offering infinite love. Only God can redeem man, because only God is the source of life, and only He can restore what was eternally lost.
[ 22 For just as in Adam all are dying, so also in the Christ all will be made alive.]
[5 For there is one God, and one mediator between God and men, a man, Christ Jesus, 6 who gave himself a corresponding ransom for all—this is what is to be witnessed to in its own due time.]
[ 28 Just as the Son of man came, not to be ministered to, but to minister and to give his life as a ransom in exchange for many.”]
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correspond - have a close similarity; match or agree almost exactly:
Adam was created by God. Adam was God's first human son. God was not created; he has always been and cannot die.
Adam and God are not corresponding of one another.
God's first created spirit angel son made human, is corresponding to Adam.
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[14 “To the angel of the congregation in La·o·di·ceʹa write: These are the things that the Amen says, the faithful and true witness, the beginning of the creation by God]
[14 And the Word became flesh and dwelt among us. And we beheld His glory, a glory as of an only begotten from the Father, full of grace and truth.]
[13He rescued us from the authority of the darkness and transferred us into the kingdom of his beloved Son, 14by means of whom we have our release by ransom, the forgiveness of our sins. 15He is the image of the invisible God, the firstborn of all creation]
[5 Keep this mental attitude in you that was also in Christ Jesus, 6 who, although he was existing in God’s form, did not even consider the idea of trying to be equal to God. 7 No, but he emptied himself and took a slave’s form and became human. 8 More than that, when he came as a man, he humbled himself and became obedient to the point of death, yes, death on a torture stake.]