FOR WE PREACH NOT OURSELVES, BUT CHRIST JESUS THE LORD; AND OURSELVES YOUR SERVANTS FOR JESUS' SAKE. -- 2 COR 4:5

There can be only one purpose for a Church, to follow the marching orders of her Lord:

"Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son and of the Holy Ghost: teaching them to observe all things whatsoever I have commanded you." - Matthew 28:19-20