19 "Go therefore and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit, 20 teaching them to observe all that I commanded you; and lo, I am with you always, even to the end of the age."
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If the original disciples had not obeyed this verse you would not be a Christian today. If you do not obey this verse, who will end up with a Christless eternity. Please pray that all Christians would catch the vision laid out in the above verse and obey it. Bill Bright of Campus Crusade for Christ states the following:
How You Can Help Fulfill the Great Commission
A Global Strategy
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2. What is the Great Commission?
The Great Commission is our Lord's command take the gospel to every person throughout the world and to make disciples in all nations. It involves building and multiplying disciples in all nations so that they can, in turn, saturate their nations with the Good News and train other disciples to do the same generation after generation through the process of spiritual multiplication.
Christ did not commission us to Christianize all nations; He called us to disciple and evangelize them. Our responsibility is to preach and teach Christ's dynamic gospel; it is the Holy Spirit's responsibility to make our witness effective. With the responsibility, however, Christ also gave us everything necessary for success.
Go read the whole thing at “How You Can Help Fulfill the Great Commission”