The first thing you need to understand is that the world's renewal was accomplished by the very same Word that created it in the first place. So, the… - Athanasius of Alexandria

the renewal of creation has been wrought by the Self-same Word Who made it in the beginning. There is thus no inconsistency between creation and salvation; for the One Father has employed the same Agent for both works, effecting the salvation of the world through the same Word Who made it in the beginning.

But when the human being had once been made, and necessity required the healing, not for the things that were not, but for the things that had come to be, it followed that the healer and Savior had to come among those who had already been created, to heal what existed. He became a human being for this, and used his body as a human instrument. For if it was not right to happen in this way, how should the Word appear, when he wished to use an instrument? Or whence was he to take it, if not from those who already existed and had need of his divinity through one like [themselves]? For it was not non-existent things that needed salvation, so that a command alone would have sufficed, but the human being, already in existence, who was corrupted and perishing. Whence it was reasonable and good that the Word should use a human instrument and unfold himself to all things.

Again the enemy suggested the ease of pleasure. But he like a man filled with rage and grief turned his thoughts to the threatened fire and the gnawing worm, and setting these in array against his adversary, passed through the temptation unscathed. All this was a source of shame to his foe. For he, deeming himself like God, was now mocked by a young man; and he who boasted himself against flesh and blood was being put to flight by a man in the flesh. For the Lord was working with Antony — the Lord who for our sake took flesh and gave the body victory over the devil, so that all who truly fight can say 1 Corinthians 15:10, 'not I but the grace of God which was with me.

He became what we are so that he might make us what he is.