• Left Hand: Eb-Bb 
• Right Hand: Eb-F-Bb

DIVINUM MYSTERIUM is a plainsong, or chant, associated with the “Divinum mysterium” text in manuscripts dating from the twelfth to fifteenth centuries. The tune was published in triple meter in Theodoricis Petri's Piae Cantiones (1582). Some hymnals retain the dance-like triple meter, while others keep the original unmeasured form of the chant.

Carol Bechtel has served as professor of Old Testament at Western Theological Seminary in Holland, Michigan, since 1994. She is a graduate of Hope College and Western Theological Seminary, and she received her Ph.D. in Old Testament from Yale University. Bechtel preaches and teaches widely and is the author of several books, including Esther: A Commentary for Teaching and Preaching (Interpretation, WJK, 2002). She is a General Synod Professor of Theology in the Reformed Church in America and has served as president of the RCA’s General Synod (1998/1999) and as moderator of its General Synod Council (1999/2000). She lives in Holland, Michigan, with her husband, Tom Mullens, where they enjoy a growing group of children and grandchildren. Her interests include singing, cooking, gardening, and the Celtic harp. She served on the editorial committee for Psalms for All Seasons (2012) and for Lift Up Your Hearts (2013).

Paul G. Bunjes (b. September 27, 1914; d. June 27, 1998) was an organist, author, and organ designer. He wrote The Praetorius Organ (four volumes), numerous articles for periodicals, and was an accomplished composer and arranger. He was a major contributor to the Lutheran Book of Worship (1978) and Lutheran Worship (1982). Bunjes was Professor of Music at Concordia University for many years.