Johannes Scheffler assumed the name Angelus Silesius on his leaving the Lutheran church to become a Catholic. He became enmeshed in the bitter controversies of post-Reformation Europe. Soon after his death, however, his masterpiece was claimed by Protestants and Catholics alike as their mystical classic. Frederick Franck shows the poets macro-ecumenical significance in the essay that introduces his translation of these verses, and by adding a "running commentary" of sayings by the ancient Japanese and Chinese masters, with whom this Christian mystic shows a remarkable affinity.