2. The sufficiency of Scripture reminds us that we are to add nothing to Scripture and that we are to consider no other writings of equal value to Scripture. This principle is violated by almost all cults and sects. Mormons, for example, claim to believe the Bible, but they also claim divine authority for the Book of Mormon. Christian Scientists similarly claim to believe the Bible, but in practice they hold the book Science and Health With a Key to the Scriptures by Mary Baker Eddy, on a par with Scripture or above it in authority. Since these claims violate God’s commands not to add to his words, we should not think that any additional words from God to us would be found in these writings. Even in Christian churches a similar error is sometimes made when people go beyond what Scripture says and assert with great confidence new ideas about God or heaven, basing their teachings not on Scripture but on their own speculation or even on claimed experiences of dying and coming back to life.3. The sufficiency of Scripture also tells us that God does not require us to believe anything about himself or his redemptive work that is not found in Scripture. Among writings from the time of the early church are some collections of alleged sayings of Jesus that were not preserved in the Gospels. It is likely that at least some of the “sayings of Jesus” found in these writings are rather accurate records of things Jesus actually said (though it is now impossible for us to determine with any high degree of probability which sayings those are). But it does not really matter at all for our Christian lives if we never read any of those sayings, for God has caused to be recorded in Scripture everything that we need to know about Jesus’ words and deeds in order to trust and obey him perfectly. Though these collections of sayings do have some limited value in linguistic research and perhaps in the study of the history of the church, they are of no direct value whatever for us in learning what we should believe about the life and teachings of Christ, or in formulating our doctrinal or ethical convictions.4. The sufficiency of Scripture shows us that no modern revelations from God are to be placed on a level equal to Scripture in authority. At various times throughout the history of the church, and particularly in the modern charismatic movement, people have claimed that God has given revelations through them for the benefit of the church. However we may evaluate such claims,3 we must be careful never to allow (in theory or in practice) the placing of such revelations on a level equal to Scripture.4 We must insist that God does not require us to believe anything about himself or his work in the world that is contained in these revelations but not in Scripture. And we must insist that God does not require us to obey any moral directives that come to us through such means but that are not confirmed by Scripture. The Bible contains everything we need God to tell us for trusting and obeying him perfectly.5It should also be noted at this point that whenever challenges to the sufficiency of Scripture have come in the form of other documents to be placed alongside Scripture (whether from extrabiblical Christian literature of the first century or from the accumulated teachings of the Roman Catholic Church, or from the books of various cults such as the Book of Mormon), the result has always been (1) to deemphasize the teachings of the Bible itself and (2) to begin to teach some things that are contrary to Scripture. This is a danger of which the church must constantly be aware.5. With regard to living the Christian life, the sufficiency of Scripture reminds us that nothing is sin that is not forbidden by Scripture either explicitly or by implication. To walk in the law of the Lord is to be “blameless” (Ps. 119:1). Therefore we are not to add prohibitions to those already stated in Scripture. From time to time there may be situations in which it would be wrong, for example, for an individual Christian to drink coffee or Coca-Cola, or to attend movie theaters, or to eat meat offered to idols (see 1 Cor. 8–10), but unless some specific teaching or some general principle of Scripture can be shown to prohibit these (or any other activities) for all believers for all time, we must insist that these activities are not in themselves sinful and they are not in all situations prohibited by God for his people.6This also is an important principle because there is always the tendency among believers to begin to neglect the regular daily searching of Scripture for guidance and to begin to live by a set of written or unwritten rules (or denominational traditions) concerning what one does or does not do in the Christian life.Furthermore, whenever we add to the list of sins that are prohibited by Scripture itself, there will be harm to the church and to the lives of individual believers. The Holy Spirit will not empower obedience to rules that do not have God’s approval from Scripture, nor will believers generally find delight in obedience to commands that do not accord with the laws of God written on their hearts. In some cases, Christians may repeatedly and earnestly plead with God for “victory” over supposed sins that are in fact no sins at all, yet no “victory” will be given, for the attitude or action in question is in fact not a sin and is not displeasing to God. Great discouragement in prayer and frustration in the Christian life generally may be the outcome.In other cases, continued or even increasing disobedience to these new “sins” will result, together with a false sense of guilt and a resulting alienation from God. Often there arises an increasingly uncompromising and legalistic insistence on these new rules on the part of those who do follow them, and genuine fellowship among believers in the church will fade away. Evangelism will often be stifled, for the silent proclamation of the gospel that comes from the lives of believers will at least seem (to outsiders) to include the additional requirement that one must fit this uniform pattern of life in order to become a member of the body of Christ.One clear example of such an addition to the commands of Scripture is found in the opposition of the Roman Catholic Church to “artificial” methods of birth control, a policy that finds no valid support in Scripture. Widespread disobedience, alienation, and false guilt have been the result. Yet such is the propensity of human nature to make such rules that other examples can probably be found in the written or unwritten traditions of almost every denomination.6. The sufficiency of Scripture also tells us that nothing is required of us by God that is not commanded in Scripture either explicitly or by implication. This reminds us that the focus of our search for God’s will ought to be on Scripture, rather than on seeking guidance through prayer for changed circumstances or altered feelings or direct guidance from the Holy Spirit apart from Scripture. It also means that if someone claims to have a message from God telling us what we ought to do, we need never assume that it is sin to disobey such a message unless it can be confirmed by the application of Scripture itself to our situation.The discovery of this great truth could bring tremendous joy and peace to the lives of thousands of Christians who, spending countless hours seeking God’s will outside of Scripture, are often uncertain about whether they have found it. In fact, many Christians today have very little confidence in their ability to discover God’s will with any degree of certainty. Thus, there is little striving to do God’s will (for who can know it?) and little growth in holiness before God.The opposite ought to be true. Christians who are convinced of the sufficiency of Scripture should begin eagerly to seek and find God’s will in Scripture. They should be eagerly and regularly growing in obedience to God, knowing great freedom and peace in the Christian life. Then they would be able to say with the psalmist:I will keep your law continually,for ever and ever;and I shall walk at liberty,for I have sought your precepts …Great peace have those who love your law;nothing can make them stumble.(Ps. 119:44–45, 165)7. The sufficiency of Scripture reminds us that in our doctrinal and ethical teaching we should emphasize what Scripture emphasizes and be content with what God has told us in Scripture. There are some subjects about which God has told us little or nothing in the Bible. We must remember that “The secret things belong to the LORD our God” (Deut. 29:29) and that God has revealed to us in Scripture exactly what he deemed right for us. We must accept this and not think that Scripture is something less than it should be, or begin to wish that God had given us much more information about subjects on which there are very few scriptural references. Of course, there will be some situations where we are confronted with a particular problem that requires a great deal of attention, far greater than the emphasis that it receives in the teaching of Scripture. But those situations should be relatively infrequent and should not be representative of the general course of our lives or ministries.It is characteristic of many cults that they emphasize obscure portions or teachings of Scripture (one thinks of the Mormon emphasis on baptism for the dead, a subject that is mentioned in only one verse in the Bible [1 Cor. 15:29], in a phrase whose exact meaning is apparently impossible now to determine with certainty). But a similar error was made by an entire generation of liberal New Testament scholars in the earlier part of this century, who devoted most of their scholarly lives to a futile search for the sources “behind” our present gospel narratives or to a search for the “authentic” sayings of Jesus.Unfortunately, a similar pattern has too often occurred among evangelicals within various denominations. The doctrinal matters that have divided evangelical Protestant denominations from one another have almost uniformly been matters on which the Bible places relatively little emphasis, and matters in which our conclusions must be drawn from skillful inference much more than from direct biblical statements. For example, abiding denominational differences have occurred or have been maintained over the “proper” form of church government, the exact nature of Christ’s presence in the Lord’s Supper, the exact sequence of the events surrounding Christ’s return, the categories of persons who should be admitted to the Lord’s Supper, the way in which God planned that the merits of Christ’s death would be applied to believers and not applied to unbelievers, the proper subjects for baptism, the correct understanding of the “baptism in the Holy Spirit,” and so forth.We should not say that these issues are all unimportant, nor should we say that Scripture gives no solution to any of them (indeed, with respect to many of them a specific solution will be defended in subsequent chapters of this book). However, since all of these topics receive relatively little direct emphasis in Scripture it is ironic and tragic that denominational leaders will so often give much of their lives to defending precisely the minor doctrinal points that make their denominations different from others. Is such effort really motivated by a desire to bring unity of understanding to the church, or might it stem in some measure from human pride, a desire to retain power over others, and an attempt at self-justification, which is displeasing to God and ultimately unedifying to the church?