Believing God at his word is in no way inconsistent with human dignity, anymore than it dishonors a child to rely with unlimited trust on the word of her or his father. So far from gradually outgrowing this authority, Christian believers rather progressively learn to believe God at his word and to renounce all their own wisdom. On earth believers never move beyond the viewpoint of faith and authority. To the degree that they increase in faith, the clinging all the more firmly to the authority of God and his word. (Taken from Prolegomena, p. 464.)
The maturity of one’s faith in Jesus can be demonstrated clearly by their acceptance, trust, and obedience to the Bible as God’s authoritative word. As Christians grow, they do not drift or graduate from the Bible, but depend on and trust it more.