    Sentence 1: Why have modern  Lutherans stopped using the  hymn?    Sentence * 2 Sixteenth-century  Lutheran hymnals also included  "Wir glauben all" among the  catechetical hymn: although  18th-century hymnals tended to  label the hymn as Trinitarian  rather than catechetical, and  20th-century Lutherans rarely  use the hymn because of  the perceived d culty of  its tune.                