A critical issue in our increasingly post-modern times is the sufficiency of the Scriptures. Both Roman Catholics with their sacred tradition and Charismatics with their emphasis on continuing revelation via the Holy Spirit give lip-service to the Holy Scriptures. However, to these groups, the Scriptures are not the sole authority for Christian faith and life. This is a significant dividing line, one with profound theological ramifications. Consider the results of a 1980 Gallup poll which sought to determine Christian’s opinions on religious authority. The question was, “If you, yourself, were testing your religious beliefs, which ONE of these four religious authorities would you turn to first?” The results are sobering, even more so when one acknowledges the statistics are 33 years old:
The sufficiency of the Scriptures has fallen upon hard times. This series will examine what Scripture itself has to say on the matter. First, some brief statements from both orthodox Christians and Roman Catholics on the sufficiency of Scripture will be provided to set the stage, so to speak. Second, a biblical theology of books by several New Testament writers will be presented and their particular views on the sufficiency of Scripture analyzed in context. Third, an exposition will be presented on several critical passages relating to the sufficiency of the Scriptures. Fourth, the distinctly Baptist (and biblical) position of the New Testament being the sole authority for church polity is presented. Fifth, conclusions will be drawn. It will be demonstrated that the Scriptures alone are the only infallible authority for Christian faith and life.
The objective principle of Protestantism maintains that the Bible, as the inspired record of revelation, is the only infallible rule of faith and practice.
Scripture alone is the inerrant, infallible record of God’s revelation to mankind. But Scripture is more than the record of God’s revelation; it is itself the only infallible, inspired revelation from God that exists today. This is not to say that Scripture is equivalent to the sum total of all revelation that God has been pleased to disclose (Jn 20:30-31; 21:25). But it is to say that Scripture alone constitutes and conveys all that is necessary for God’s glory, man’s salvation, faith and life.
The Reformers did recognize a Christian tradition, but only a Christian tradition based on, and derived from, Scripture, and not one that equaled or even surpassed it in authority.
Roman Catholic theologians recognize two well-springs of divine authority; Scripture and Tradition.
Sacred tradition and sacred Scripture, then, are bound closely together, and communicate one with the other. For both of them, flowing out from the same divine well-spring, come together in some fashion to form one thing, and move towards the same goal . . . Hence, both Scripture and Tradition must be accepted and honored with equal feelings of devotion and reverence.
James Cardinal Gibbons, a 19th century Catholic theologian, wrote:
Now, the Scripture is the great depository of the Word of God. Therefore, the Church is the divinely appointed Custodian and Interpreter of the Bible. For, her office of infallible Guide were superfluous if each individual could interpret the Bible for himself.
The Catholic Church correctly teaches that our Lord and His Apostles included certain important duties of religion which are not recorded by the inspired writers (Jn 21:25) . . . We must conclude that the Scriptures alone cannot be a sufficient guide and rule of faith because they cannot, at any time, be within the reach of every inquirer; because they are not of themselves clear and intelligible even in matters of the highest importance, and because they do not contain all the truths necessary for salvation.
 Philip Schaff, History of the Christian Church, 7 vols. (Peabody, MS: Hendrickson, 2011), 7:16.
 David T. King, Holy Scripture: The Ground and Pillar of Our Faith, 3 vols. (Battle Ground, WA: Christian Truth, 2001), 1:43.
 Louis Berkhof, Systematic Theology, vol. 1, combined ed. (Grand Rapids, MI: Eerdmans, 1996), 169.
 Vatican Council II: The Conciliar and Post Conciliar Documents, Austin Flannery, O.P., general editor (Boston: St. Paul Editions, 1980), 754-755. Quoted in King, Holy Scripture, 50.