Night and Sleep Author:Jalal Al-Din Rumi Seventeen poems of Rumi, a 13th-century Persian mystic, in English versions by Robert Bly and Coleman Barks. These poems express a longing for the "Mystical Friend," a spiritual guide, or brother. "When Things are Heard" from the collection is featured on Keith Jarrett's double album, Invocations and The Moth and the Flame on ECM Records.