It was the Word of God Himself, the One who is before the ages, the
invisible, the ungraspable, the incorporeal … the light from the light,
the source of life and immortality … the Undistorted Image [of the
Father], the definition and explanation of the Father … He was conceived by the Virgin... flesh and spirit, the One deifying and the other deified... and the Uncreated is created, and the Uncontainable is
contained ... The One Who enriches becomes poor in my flesh, that I
might be enriched through his divinity... and empties Himself of His
own glory for a short time, that I may participate in His fullness. [As
Adam], I participated in the [Divine] Image [as I was created in the
Image of God], and did not preserve it; He participates in my flesh
both to save the Image and to make my flesh immortal.
-Gregory Nazianzen (the Theologian) in his "Oration 38 on the Nativity"