O pastor animarum is the shortest piece of the programme, a single sentence by Hildegard von Bingen, and it closes the concert like a whispered amen.
O shepherd of souls, and O first voice, through whom we were all created: now may it please you to set us free from our miseries and our weakness.
God is called a voice here, the first voice, the one through whom everything was made. For a singer there may be no dearer name for the divine, and no better place to end: one human voice, alone in the stone, answering the first voice with its last note.