"The musical tradition of the universal Church is a treasure of inestimable value, greater even than that of any other art. The main reason for this pre-eminence is that, as a combination of sacred music and words, it forms a necessary or integral part of solemn liturgy."
To put the same idea in my own vernacular version, I'd paraphrase the musical "Nine": What good is church without le singing? (And that idea is even more fun if you can hear Judi Dench singing it in your head.)
So is it true that music is greater than any other art when it comes to religious value? Can we even measure the value of Michelangelo's Pieta against Mozart's Requiem? Or perhaps the value simply in the weekly direct participation of the congregation in music.