Our first reading, from the prophet Isaiah, shows that God’s word is not so much descriptive as creative: it produces what it says. In the very intelligibility of the material world, we can sense this reality-producing power. We can also sense it in the Biblical word, an invitation into divine friendship. But we encounter it most powerfully in the Word made flesh, Jesus Christ. To what extent do we permit this reality-changing Word to take root in us? That is the challenge of our readings for today.