Christians should be a witness of Jesus Christ locally, regionally and throughout the world.
Acts 1:8 - "But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth."
Evangelism should be sensitive and relevant to the recipient.
1 Corinthians 9:19-23 - "For though I be free from all men, yet have I made myself servant unto all, that I might gain the more. And unto the Jews I became as a Jew, that I might gain the Jews; to them that are under the law, as under the law, that I might gain them that are under the law; To them that are without law, as without law, (being not without law to God, but under the law to Christ,) that I might gain them that are without law. To the weak became I as weak, that I might gain the weak: I am made all things to all men, that I might by all means save some. And this I do for the gospel's sake, that I might be partaker thereof with you."
Evangelism should take place only if we have the time.
Acts 5:42 - "And daily in the temple, and in every house, they ceased not to teach and preach Jesus Christ."
Evangelism should include the preaching of repentance and remission of sins.
Luke 24:47 - "And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem."
Evangelism doesn't include showing your good works before mankind.
Matthew 5:16 - "Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven."
The laborers are many, but the harvest of souls is few.
Luke 10:1-2 - "After these things the Lord appointed other seventy also, and sent them two and two before his face into every city and place, whither he himself would come. Therefore said he unto them, The harvest truly is great, but the labourers are few: pray ye therefore the Lord of the harvest, that he would send forth labourers into his harvest."
An evangelist is rewarded by God based upon whether they establish or disciple new converts.
1 Corinthians 3:6-9 - "I have planted, Apollos watered; but God gave the increase. So then neither is he that planteth any thing, neither he that watereth; but God that giveth the increase. Now he that planteth and he that watereth are one: and every man shall receive his own reward according to his own labour. For we are labourers together with God: ye are God's husbandry, ye are God's building."
(adapted from "Evangelism Quiz" at http://www.christianet.com)
A friend e-mailed me the above photo, along with the link http://av8ng.blogspot.com/