"The ultimate aim of world missions is that God would create, by His Word, worshippers who glorify His name through glad-hearted faith and obedience. Missions exists because worship doesn't. When the time of ingathering is over, and the countless millions of redeemed fall on their faces before the throne of God, missions will be no more. It is a temporary necessity. But worship abides forever. Worship therefore is the fuel and the goal of missions."
-from the Bethlehem Baptist Church Shepherd's Training Manual by David Livingstone (which, by the way, looks like a fantastic manual for small group dynamics)