“People mistake apologetics for evangelism. Like the activities we’ve considered above, apologetics itself is a good thing. We are instructed by Peter to be ready to give a reason for the hope that we have (1 Pet. 3:15). And apologetics is doing exactly that. Apologetics is answering questions and objections people may have about God or Christ, or about the Bible or the message of the gospel. Apologists for Christianity argue for its truth. They maintain that Christianity better explains that sense of longing that all people seem to have. Christianity better explains human rationality. It fits better with order. They may argue (as C. S. Lewis does in Mere Christianity) that it better fits with the moral sense that people innately have. It copes better with problems of alienation and anxiety. Christians may – and should – argue that Christianity’s frankness about death and mortality commends it. These can be good arguments to have. Answering questions and defending parts of the good news may often be a part of conversations Christians have with non-Christians, and while that may have been a part of our own reading or thinking or talking as we came to Christ, such activity is not evangelism. Apologetics can present wonderful opportunities for evangelism. Being willing to engage in conversations about where we came from or what’s wrong with this world can be a significant way to introduce honest discussions about the gospel. For that matter, Christians can raise questions with their non-Christian friends about the purpose of life, what will happen after death, or the identity of Jesus Christ. Any of these topics will take work and careful thought, but they can easily lead into evangelism. It should also be said that apologetics has its own set of dangers. You might unwittingly confirm someone in their unbelief by your inability to answer questions that are impossible to answer anyway.
You can easily leave the impression that if you don’t know how to answer your friends’ questions, then you don’t really know enough to believe that the Christian gospel is true either. But just because we don’t know everything doesn’t mean we don’t know anything. All knowledge in this world is limited. We proceed from what we know, and we work that out. Everyone, from the youngest child to the most celebrated research scientist, does this. Apologetics can be very important work, but it should be undertaken with care. By far the greatest danger in apologetics is being distracted from the main message. Evangelism is not defending the virgin birth or defending the historicity of the resurrection. Apologetics is defending the faith, answering the questions others have about Christianity. It is responding to the agenda that others set. Evangelism, however, is following Christ’s agenda, the news about him. Evangelism is the positive act of telling the good news about Jesus Christ and the way of salvation through him.”
One of the most common and dangerous mistakes in evangelism is to misinterpret the results of evangelism – the conversion of unbelievers – for evangelism itself, which is the simple telling of the. gospel message. This may be the most subtle misunderstanding, yet it is a misunderstanding still. Evangelism must not be confused with its fruit. Now, if you combine this misunderstanding with a misunderstanding of the gospel itself, and of what the Bible teaches about conversion, then it is very possible to end up thinking not only that evangelism is seeing others converted, but thinking that it is within our power to do it! According to the Bible, converting people is not in our power. And evangelism may not be defined in terms of results but only in terms of faithfulness to the message preached. John Stott has said, “To ‘evangelize’ . . . does not mean to win converts . . . but simply to announce the good news, irrespective of the results.” To evangelize is to spread the good news that Jesus Christ died for our sins and was raised from the dead according to the Scriptures, and that as the reigning Lord he now offers the forgiveness of sins and the liberating gift of the Spirit to all who repent and believe.”— Mark Dever, The Gospel and Personal Evangelism, (pgs. 76-79).