Missions is not the ultimate goal o the church. Worship is. Missions exists because worship doesn’t. Worship is ultimate, not missions, because God is ultimate, not man. When this age is over, and the countless millions of the redeemed fall on their faces before the throne of God, missions will be no more. It is a temporary necessity. But worship abides forever.
Let the Nations Be Glad, John Piper
I`ve got this from Jon Owen blog, and he got it from I think it was Amazon.