“The norm of our worship must be the Word of God, the Word that He Himself has spoken. As we turn to this Word, we see a pattern of acceptable worship, a pattern that is repeated throughout the fabric of Scripture from beginning to end. Scripture is, as the Reformers confessed, norma ormans non normata, “the norm of norms which cannot be normed.” That is what we mean when we say “sola scriptura”— that Scripture is the norm of our worship. There is nothing external to Scripture that can “norm” or correct it.”
– Albert Mohler, He Is Not Silent: Preaching in a Post Modern World