What is the purpose of a Choir?

I ran across this little excerpt from a sermon that was preached by Rev. John Andrew, Rector Emeritus at St. Thomas Church in New York at the beginning of August.  I think it speaks precisely to the heart of why we do what we do, and why our singing, rehearsing and leading worship together in community is an important, holy, and powerful responsibility not to be taken lightly.  I’m so thankful to be a part of this with you all who make music together at St. George's.