Humanity teaching angels is no small thing to overlook, for it marks an important development in the maturation in the sons of Adam. In former times God used angels as means by which to deliver his word to humans (Hebrews 2:2). However, after the first advent of Jesus Christ, who is the Second Adam, we see that true humanity–the church/bride of Jesus Christ–delivers a word to the angels, a message which makes “manifold [much variegated; a wide spectrum like colors] the wisdom of God.”
Humanity is maturing, and Jesus Christ is both the reason and the proof that humanity is maturing. How so? God eternally purposed to reveal Jesus Christ–“the manifold wisdom of God”–by the church. You cannot talk about Son of God–Jesus Christ the God-Man–without talking about the church, and vice versa. In times past God spoke to humanity by the angels and prophets, however, now the Lord speaks to us (humanity) by his incarnate Son, Jesus Christ (Hebrews 1). Thus, now true humanity–the church–teaches the angels about the “manifold wisdom of God.” Because of Jesus Christ humanity has been transformed from glory to glory (2 Cor 3:18). Humanity has put on the new man: Col 3:10–“And have put on the new man, which is renewed in knowledge after the image of him that created him.” Truly humanity in Jesus Christ (and united to Jesus Christ and counted righteous in Jesus Christ) is maturing, for in putting on the new man we are “created in righteousness and true holiness” (Eph 4:24).
So, humanity is growing up because true-humanity/the Church knows Jesus Christ. We know Him, He who is the Son and Wisdom of God. Humanity: we are maturing, we are growing up, we are becoming wiser. Praise God!