Christ, Our Joy
Worship is the fuel and goal of missions. Missions exits because worship does not. . . . Passion for God in worship precedes the offer of God in preaching. You can’t commend what you don’t cherish. Missionaries will never call out, “Let the nations be glad!” who cannot say from the heart, “I rejoice in the Lord. . . . I will be glad and exult in thee, I will sing praise to thy name, O Most High” (Ps 104:34, 9:2). Missions begins and ends in worship.
– John Piper