I found this paragraph to be strikingly beautiful in John Webster’s Holy Scripture: A Dogmatic Sketch (Current Issues in Theology):
Second, as God’s free self-presentation, revelation is a free work of sovereign mercy. God’s revelation is God’s spiritual presence: God is the personal subject of the act of revelation, and therefore revelation can in no way be commodified. God is – as Gèrard Siegwalt puts it – revelation’s ‘uncontainable content’. As spiritual presence, the presence of God is free: it is not called forth by any reality other than itself; it is majestically spontaneous and uncaused. Its origin, actualisation and accomplishment require nothing beyond God. Like the entire history of the divine mercy of which it is a part, revelation is unexpected, undeserved, possible only as and because God is, and present after the manner of God. In Barth’s curious phrase, ‘God is the Lord in the wording of his Word.’
Scripture is where we meet God in all the freedom of his self-revealing Lordship.