Albert Haase, O.F.M. (Ph.D., Fordham University), is adjunct professor of spirituality at Catholic Theological Union in Chicago, Illinois. He is also director of the School of Spirituality at Mayslake Ministries in Westmont, Illinois. A former missionary to mainland China for over a decade, he is the coauthor of Enkindled and the author of Instruments of Christ (both published by St. Anthony Messenger Press).

M. Robert Mulholland Jr. (1936-2015) was emeritus professor of New Testament at Asbury Theological Seminary and the author of several books, including Shaped by the Word, The Deeper Journey, Revelation and the landmark spiritual formation book Invitation to a Journey. He also served as pastor of Shirley Community Church in Shirley Mills, Maine.During his extensive academic career, Mulholland served as adjunct professor at the Academy for Spiritual Formation and taught at several seminaries and universities around the world, including Wesley Theological Seminary, Harvard University, McMurry University, Moscow Evangelical Christian Seminary (Moscow, Russia), West Africa Theological Seminary (Lagos, Nigeria) and Baltic Mission Center Theological Seminary (Tallinn, Estonia). An elder in the Kentucky Conference of the United Methodist Church, Mulholland was a frequent speaker at Bible and spiritual renewal conferences. He and his wife, Lynn, have two children.