Scripture and It's Own Truth
Just as light is distinguished from darkness, white from black, sweet from bitter, so Scripture is recognized by its own truth. But Scripture acquires certainty as God’s own Word with us by the testimony of the Holy Spirit. Though proofs and reasonings are of great value, this testimony surpasses them by far; it is more excellent than all reason.
Herman Bavinck, Reformed Dogmatics: Prolegomena, ed. John Bolt, trans. John Vriend, vol. 1 (Grand Rapids, MI: Baker Academic, 2003), 583.