Evangelism is the work of a Christian evangelist, of which all true Christians are obligated to partake to some extent, which seeks to persuade other people to become Christian, especially by sharing the basics of the Gospel, but also the deeper message of biblical truths. Today the Gospel is almost an unknown, so what does the Christian evangelist do? Preevangelism is laying a foundation for those who have no knowledge of the Gospel, giving them background information, so that they are able to grasp what they are hearing. The Christian evangelist is preparing their mind and heart so that they will be receptive to the biblical truths. In many ways, this is known as apologetics. Christian apologetics Greek: apologia, "verbal defense, speech in defense"] is a field of Christian theology which endeavors to offer a reasonable and sensible basis for the Christian faith, defending the faith against objections. It is reasoning from the Scriptures, explaining and proving, as one instructs in sound doctrine, many times having to overturn false reasoning before he can plant the seeds of truth. It can also be earnestly contending for the faith and saving one from losing their faith, as they have begun to doubt. Moreover, it can involve rebuking those who contradict the truth. It is being prepared to make a defense to anyone who asks the Christian evangelist for a reason for the hope that is in him or her. - Jude 1.3, 21-23; 1 Pet 3.15; Acts 17:2-3; Titus 1:9. What do we mean by obligated and what we mean by evangelism are at the heart of the matter and are indeed related to each other. EVANGELISM: An evangelist is a proclaimer of the gospel or good news, as well as all biblical truths. There are levels of evangelism, which is pictured in first-century Christianity. All Christians evangelized in the first century, but a select few fit the role of a full-time evangelist (Ephesians 4:8, 11-12), like Philip and Timothy. Both Philip and Timothy are specifically mentioned as evangelizers. (Ac 21:8; 2 Tim. 4:5) Philip was a full-time evangelist after Pentecost, who was sent to the city of Samaria, having great success. An angel even directed Philip to an Ethiopian Eunuch, to share the good news about Christ with him. Because of the Eunuch's already having knowledge of God by way of the Old Testament, Philip was able to help him understand that the Hebrew Scriptures pointed to Christ as the long awaited Messiah. In the end, Philip baptized the Eunuch. Thereafter, the Spirit again sent Philip on a mission, this time to Azotus and all the cities on the way to Caesarea. (Ac 8:5, 12, 14, 26-40) Paul evangelized in many lands, setting up one congregation after another. (2 Cor. 10:13-16) Timothy was an evangelizer or missionary, and Paul placed distinct importance on evangelizing when he gave his parting encouragement to Timothy. - 2 Timothy 4:5; 1 Timothy 1:3. The office of apostle and evangelist seem to overlap in some areas, but could be distinguished in that apostles traveled and set up congregations, which took evangelizing skills, but also developed the congregations after they were established. The evangelists were more of a missionary, being stationed in certain areas to grow and develop congregations. In addition, if we look at all of the apostles and the evangelists, plus Paul's more than one hundred traveling companions, it seems very unlikely that they could have had Christianity at over one million by the 125 C.E. This was accomplished because all Christians were obligated to carry out some level of evangelism. OBLIGATED: In the broadest sense of the term for evangelizer, all Christians are obligated to play some role as an evangelist.