The four evangelists, by Jakob Jordaens. The painting shows the authors of the four "Gospels" in the New Testament.

Evangelism is the Christian practice of preaching about Jesus Christ to both Christians and non-Christians. The purpose of most evangelism is to help others receive eternal (forever) salvation to people who have not heard of, or have denied God. Evangelism is done in obedience to the Great Commission, a command from Jesus to his disciples to convert others, as recorded in the New Testament.