The statement “the Bible is our only rule for faith and practice” appears in many doctrinal statements. Sometimes, it takes a similar form, stating that the Bible is “the final authority,” “the only infallible rule,” or “the only certain rule.” This sentiment, whatever the wording, is a way for Bible-believing Christians to declare their commitment to the written Word of God and their independence from other would-be authorities.
The statement that the Bible is the “only rule for faith and practice” is rooted in the sufficiency of Scripture, as revealed in 2 Timothy 3:16–17: “All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness, so that the servant of God may be thoroughly equipped for every good work.” Because God is sovereign, His Word is the absolute authority in our lives, and by it God equips us for His service. As A. A. Hodge wrote, “Whatever God teaches or commands is of sovereign authority. . . . The Scriptures of the Old and New Testaments are the only organs through which, during the present dispensation, God conveys to us a knowledge of his will about what we are to believe concerning himself, and what duties he requires of us” (Outlines of Theology, chapter 5).
When we say, “The Bible is our only rule for faith and practice,” we mean that we hold the Bible, God’s Holy Word, to be our ultimate guide for what we believe (“faith”) and what we do (“practice”). We mean that the Bible trumps man’s authority, church tradition, and our own opinions. We mean we will allow nothing that opposes God’s Word to dictate our actions or control our thinking. We mean that we agree with the Reformers’ cry of sola scriptura.
When the Bible clearly reveals a truth, we believe it with all our hearts. When the Bible clearly commands us to do something, we make sure we are doing it. For example, the Bible says that Jesus is coming back again (John 14:3; Revelation 19:11–16). Since the Bible is our “only rule for faith,” we have no choice but to believe that Jesus is returning some day. Also, the Bible says that we are to “flee from sexual immorality” (1 Corinthians 6:18). Since the Bible is our “final authority for practice,” we are bound to abstain from immorality (as defined by the Bible).
We believe following the Bible as our only rule of faith and practice is the safest position, theologically. Fidelity to Scripture keeps us from being “tossed back and forth by the waves, and blown here and there by every wind of teaching” (Ephesians 4:14). As the noble Bereans taught us (Acts 17:11), all doctrines are to be examined in light of the Bible, and only what conforms to biblical truth should be accepted.
Following the Bible is also the most sensible position, because the Word of God “is eternal; it stands firm in the heavens” (Psalm 119:89) and “the law of the LORD is perfect, refreshing the soul. The statutes of the LORD are trustworthy, making wise the simple” (Psalm 19:7).