Christians can take classes, read books, attend seminars, and use other resources that help learn how to share the gospel with the lost. But unless these resources are tapped into by those with a genuine burden for the lost they will most likely never be practiced or utilized by those well-meaning students who give time and attention to them. I am convinced that the first step in any "evangelism training" ought to be "how to preach the gospel to yourself". It is a deep and abiding appreciation for the gospel in our own daily life and experience that will give us a key ingredient in evangelism: a heart for the lost. Milton Vincent offers this as the 13th reason to preach the gospel to yourself daily:
The more I rehearse and exult in gospel truths, the more there develops within me a corresponding burden for non-Christians to enter into such blessings. This is also what seems to happen to the Apostle Paul while writing the book of Romans.
In Romans 5 Paul exults in his righteous standing before God (Romans 5:1-11). In chapter 6 he speaks of the freedom from sin which Christ has accomplished in the lives of believers (Romans 6:1,2,6), a freedom which Paul latter confesses had not yet become fully realized in his own daily practice (chapter 7). Nonetheless, coming into chapter 8, he recounts the fact that there is no condemnation for those who are in Christ Jesus (Romans 8:1). With increasing flourish, he rehearses numerous gospel themes throughout the length of chapter 8, and he climaxes the chapter with a triumphant exclamation regarding the endless love of God which enables Christians to conquer overwhelmingly in all things (Romans 8:35-39).
What effect do such gospel meditations have upon Paul? What emotions do they produce in him besides the obvious joy he feels when reciting them? Paul bares his soul at the very beggining of chapter 9: "I have great sorrow," he says, :and unceasing grief in my heart. For I could wish that I myself where accursed, separated from Christ, for the sake of my brethren, my kinsman according to the flesh."
Coming down from the heights of gospel meditation, Paul's heart is devastated by a burden for his fellow-Jews to experience the saving power of the gospel. His Burden existed long before he started writing, but undoubtedly intensified by his rehearsal of gospel truths in Romans 5-8, a rehearsal which inevitably leads his thoughts toward the plight of those outside of Christ.
Hence, if I wish to have a 'Romans 9' kind of burden for non-Christians, I should become practiced at celebrating the gospel as Paul does in Romans 5-8. Over time, my joy in the gospel will become increasingly tinged with grief, and this grief-stained joy will lend a gospel-inspired passion to my ministry of evangelizing the lost. -Milton Vincent, A Gospel Primer for Christians, p.25