I posted this a couple of years ago when I had my own theology blog, but I thought it would be a nice quote to reflect on yet again:
Scripture everywhere treats the Word of God as active, bringing about its intended effects. As an illocutionary speech-act, the Logos is not only an externalization of divine thoughts but the incarnation of God’s command and promise. “For in him every one of God’s promises is a ‘Yes.’ For this reason it is through him that we say the ‘Amen,’ to the glory of God” (2 Cor. 1:20). In other words, it is because of the incarnation that we can join the rest of creation that we have led into bondage in answering back the creative, “Let it be!” with the covenantal response, “Here I am.” The incarnation is thus understood as bringing about the proper covenantal conversation: the Lord speaking, and the servant answering back to God’s glory. Christ both says our yes as our covenantal head in his active obedience, and is God’s yes in embodied form. Affirming the distinct yet inseparable two natures of Christ is the basis for such an analysis.
Lord and Servant: A Covenant Christology, pgs. 161-62 (emphasis mine)
Merry Christmas! Yes, here I am!