The eternal Word, being proper to the Father’s being, cannot advance.  Yet, Scripture says that Jesus advances in wisdom and stature.  Athanasius appeals to the incarnation: He is advancing humanly.  But, as always, what the Word does in the flesh is done for us:

“Neither then was the advance the Word’s, nor was the flesh Wisdom, but the flesh became the body of Wisdom ( tes sophias soma gegonen he sarx ). Therefore, as we have already said, not Wisdom, as Wisdom, advanced in respect of Itself; but the manhood advanced in Wisdom, transcending by degrees human nature, and being deified, and becoming and appearing to all as the organ of Wisdom ( organon ) for the operation and the shining forth of the Godhead.”

The Son took flesh to make flesh “transparent” to God.