Authority in Christianity belongs to God

The Christian principle of biblical authority means, on the one hand, that God purposes to direct the belief and behavior of his people through the revealed truth set forth in Holy Scripture; on the other hand it means that all our ideas about God should be measured, tested, and where necessary corrected and enlarged, by reference to biblical teaching. Authority as such is the right, claim, fitness, and by extension power, to control. Authority in Christianity belongs to God the Creator, who made us to know, love, and serve him, and his way of exercising his authority over us is by means of the truth and wisdom of his written Word. As from the human standpoint each biblical book was written to induce more consistent and wholehearted service of God, so from the divine standpoint the entire Bible has this purpose. And since the Father has now given the Son executive authority to rule the cosmos on his behalf (Matt. 28:18), Scripture now functions precisely as the instrument of Christ’s lordship over his followers. All Scripture is like Christ’s letters to the seven churches (Rev. 2–3) in this regard.

J.I. Packer, Concise Theology: A Guide to Historic Christian Beliefs