Rebecca Writes

• From the London Baptist Confession 1689,  chapter 1, section 4:
  

The authority of the Holy Scripture, for which it ought to be believed, dependeth not upon the testimony of any man or church, but wholly upon God (who is truth itself), the author thereof; therefore it is to be received because it is the Word of God.

• From B. B. Warfield in The Authority and Inspiration of Scripture :
  

Let it be observed that the proof of the authority of the Scriptures does not rest on a previous proof of their inspiration. Even an uninspired law is law. But when inspiration has once been shown to be fact, it comes mightily to the reinforcement of their authority. God speaks to us now, in Scripture, not only mediately through his representatives, but directly through the Scriptures themselves as his inspired word. The Scriptures thus become the crystallization of God’s authoritative will.

•  From Herman Ridderbos in The Inspiration and Authority of Holy Scripture:

The authority of the Scriptures is the great presupposition of the whole of the biblical preaching and doctrine. This appears most clearly in the way the New Testament speaks about the Old Testament. That which appears in the Old Testament is cited in the New Testament with formulas like “God says,” “the Holy Spirit says,” and so on (cf., for instance, Acts 3:24, 25; 2 Cor. 6:16; Acts 1:16). What “the Scripture says” and what “God says” is the same thing….And this naturally implies authority. “It is written” (Greek, gegraptai) in the New Testament puts an end to all contradiction.

Learn more

1. Hermeneutics and Biblical Authority by J. I. Packer
   
2. The Authority of Scripture, Part 1, Part 2 (mp3) by Wayne Grudem