This is the reason why the Word of God was made flesh, and the Son of God became Son of Man: so that we might enter into communion with the Word of God, and by receiving adoption might become Sons of God. Indeed we should not be able to share in immortality without a close union with the Immortal. How could we have united ourselves with immortality if immortality had not become what we are, in such a way that we should be absorbed by it, and thus we should be adopted as Sons of God?
IRENAEUS OF LYONS Against Heresies, III,19,1