Evangelism is a Christian movement for emphasizing personal conversion and the authority of the Bible or, by extension, any other form of preaching or proselytizing. Evangelist Ray Comfort, host of the TV show dedicated to evangelism The Way of the Master, says "simply put, Christian evangelism is when we share our faith with others." Christians often characterize evangelism as "...one beggar telling another beggar where to find bread."
The word evangelist comes from the Koine Greek word εὐαγγέλιον (transcribed as "euangelion") via Latin "Evangelium", as used in the canonical titles of the four Gospels, authored by Matthew, Mark, Luke, and John (also known as the Four Evangelists). The Greek word εὐαγγέλιον originally meant a reward for good news given to the messenger (εὔ = "good", ἀγγέλλω = "I bring a message"; the word angel is of the same root) and later "good news". The latter term gives rise to the word "Gospel".