“I know that after my departure,” Paul warned elders from that church, “savage wolves will come in among you, not sparing the flock; and from among your own selves men will arise, speaking perverse things, to draw away the disciples after them” (Acts 20:29–30).

Although false teachers in the church exist under many guises, they all, in one way or another, contradict biblical truth. They are the enemies of sound doctrine and, therefore, of God and His people. Simply to accept Scripture as the inerrant Word of God does not protect against its being misunderstood or even perverted. To give personal insights and decisions of church councils authority equal to Scripture is to contradict God’s Word—just as surely as is denying the deity of Christ or the historicity of His resurrection. The final warning of Scripture is: “I testify to everyone who hears the words of the prophecy of this book: if anyone adds to them, God shall add to him the plagues which are written in this book; and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the tree of life and from the holy city, which are written in this book” (Revelation 22:18–19, emphasis added).

The dual role of the godly preacher and teacher is to proclaim and to defend God’s Word. In the eyes of the world and, tragically, in the eyes of many genuine but untaught believers, to denounce false doctrine—especially if that doctrine is given under the guise of evangelicalism—is to be unloving, judgmental and divisive. But compromising Scripture in order to make it more palatable and acceptable, whether to believers or to unbelievers, is not “speaking the truth in love” (Ephesians 4:15). It is speaking falsehood and is the furthest thing from godly love. It is a subtle, deceptive and dangerous way to contradict God’s own Word. The faithful pastor must have no part in it. He himself tolerates, and he teaches his people to tolerate, only sound doctrine.

All Christians share the biblical mandate to cultivate biblical discernment. Remaining passive in the church and ignoring the cancerous effects of false teaching is a serious dereliction of our duty as believers. We are to be equipped with the biblical tools necessary to identify, expose, repudiate and excommunicate all wolves who sneak into the church. Out of love for Christ, His people and the pure exclusive gospel that He delivered, each of us must take up arms in the ongoing war for the truth.