To be honest, I never thought of evangelism and witnessing as two separate actions until recently. In his short (and free!) ebook, What Is the Great Commission?, R. C. Sproul writes:
Evangelism, on the other hand, is the actual proclamation—either oral or written, but certainly verbal—of the gospel. It is declaring the message of the person and work of Christ, who His is and what He has done on behalf of sinners like you and me.
That means there are several reasons that evangelism is not. It is not living your life as an example. It is not building relationships with people. It is not giving one’s personal testimony. And it is not inviting someone to church. These things may be good and helpful, but they are not evangelism. They may lay the groundwork for evangelism. They may allow others to relate to us, or they may cause someone to be curious about why we live the way we do. But they are not evangelism, because they don’t proclaim the gospel. They may say something about Jesus, but they do not proclaim the person and work of Christ.
Witnessing does not necessitate words, but evangelism must use words, either written or spoken. We see this thought from the word evangelism itself. It comes from the Greek word for gospel, which means good news or good message. Therefore, evangelism is gospelism. It is making known the gospel, and because the gospel is a message and messages must be expressed, evangelism is a verbal act.
Many Christians become incredibly fearful at the thought of doing evangelism, while others write it off as a special gifting for some Christians. While there are some Christians with the passion and gifting of evangelism, all followers are called to the task.
We see this principle in the book of Acts. Following the death of the Stephen, the first martyr within the church, the Christians of Jerusalem fled across the Roman Empire. Here is how Luke describes the act: “Now those who were scattered went about preaching the word.” (Acts 8:4)
As they fled from Jerusalem, they continued to preach the word wherever they went. They continued to tell the good news that Jesus Christ is Lord. They kept proclaiming the truth that God saves sinners from the consequences of their sins.
This powerful statement is only made more powerful by who Luke is describing. He is not merely writing about the original disciples of Jesus, like Peter or John. He is not talking about the newly formed church leaders, like Stephen’s fellow deacons. No, Luke is describing the Christians in general. Normal, everyday followers of Christ preached the word of God wherever they went, and the world was irrevocably changed.
Evangelism is the work of every believer, but please realize that this does not mean you need to have a PHD in theology. John writes that Christians overcome satanic forces “by the blood of the Lamb and by the word of their testimony, for they loved not their lives even unto death.” (Revelation 12:11)
You do not need to know the ins and outs of systematic theology in order to share the gospel; you only need to have experienced the power of Christ’s saving blood and be able to express how He saved you in words. If Christ’s blood and our proclamation of how He saved us is enough to conquer Satan, it is also entirely sufficient for delivering the gospel message to a heart that is dead in sin.
One more thought on evangelism before I move on. Your salvation was the work of God, not yourself. You were dead in sin, an object of God’s wrath, but Christ made you alive because of God’s great grace and love. Therefore, lay aside the weight of thinking that you will save people with evangelism. We can save no one. Even if we argue someone into Christianity, someone else can always argue them out.
We are simply called to share the gospel, proclaim the good news.
God does everything else.
As a farmer sows seed but God produces the growth, may we also be faithful to share His truth, knowing that God alone can bring the dead to life.