Book excerpt: Published on February 11, 1984, Salvifici Doloris addresses the question of why God allows suffering. This 30th anniversary edition includes the complete text of the letter plus commentary by Myles N. Sheehan, SJ, MD, a priest and physician trained in geriatrics with an expertise in palliative care. Acknowledgments of recent episodes of violence bring the papal document into a modern context. Insightful questions suited for individual or group use, applicable prayers, and ideas for meaningful action invite readers to personally respond to the mystery of suffering.