http://www.desiringgod.org/resource-library/conference-messages/words-of-wonder-what-happens-when-we-sing/

--
Regards,
Ryan Chia

Missions is not the ultimate goal of the church. Worship is. Mission exists
because worship doesn't. Worship is ultimate, not missions, because God is
ultimate, not man.

*From John Piper, Let The Nations Be Glad*