Missions is not the ultimate goal of 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.
John Piper
From the book “Let the Nations be Glad: Supremacy of God in Missions”