Today, I heard for the first time Morten Lauridsen’s O Magnum Mysterium (1994), and was amazed by it. I’m not a religious person at all, but sacred music is such a massive part of the history of music—Western music, yes, but really all music across cultures—that it’s just one of those things you can’t get away from, if you care about traditional music forms at all. For European classical music, especially, the role of sacred music is huge: a vast amount of the earliest written music was church music, and even into the 19th century you find composers writing masses. Hell, …