For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh:
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Bede
AD 735
He who came in the likeness of sinful flesh—not in sinful flesh—did not turn away from the remedy by which sinful flesh was ordinarily made clean…. Not from necessity but by way of example he submitted to the water of baptism, by which he wanted the people of the new law of grace to be washed from the stain of sin.