Hans Urs von Balthasar (1905-1988) was a Swiss theologian widely regarded as one of the greatest theologians and spiritual writers of modern times. Named a cardinal by Pope John Paul II, he died shortly before being formally inducted into the College of Cardinals. He wrote over one hundred books, including Prayer, Heart of the World, Mary for Today, Love Alone Is Credible, Mysterium Paschale and his major multi-volume theological works: The Glory of the Lord, Theo-Drama and Theo-Logic.