We confess that the “Word of God was not sent nor delivered by the will of man, but that holy men spoke as they were moved by the Holy Spirit [2 Peter 2:20]; and that afterwards God, from a special care which He has for us and our salvation, commanded His servants, the prophets and apostles, to commit His revealed Word to writing;… Therefore we call such writings holy and divine Scriptures [1 Timothy 3:16]” (Belgic Confession [BC], article 3).
We believe without any doubt all things contained in the 66 books of the Bible, “not so much because the Church receives and approves them as such, but more especially because the Holy Spirit witnesses in our hearts that they are from God [1 Corinthians 2:11-16], and also because they carry the evidence thereof in themselves. For the very blind are able to perceive that the things foretold in them are being fulfilled” (BC, article 5).
The Bible alone is absolute truth. Its doctrine is “most perfect and complete in all respects.” No writings or councils of men have “equal value with the truth of God, since the truth is above all; for all men are of themselves liars, and lighter than vapor [Psalm 62:9]. Therefore we reject with all our hearts whatever does not agree with this infallible rule [Deuteronomy 12:32; Galatians 1:8]” (BC, articles 7-8).