In the past year, Sufjan Stevens has released his album The Ascension and his six-volume ambient work Convocations. He’s not done. Next month, Stevens and the Los Angeles folk-pop musician Angelo De Augustine will release their new collaborative LP A Beginner’s Guide. When they announced the album, Stevens and De Augustine shared two new songs, “Reach Out” and “Olympus.” Both were gorgeous. Today, they’ve shared another new one, and it’s gorgeous, too.