Ballard’s To Know All Mysteries offers an extensive, well-researched, and insightful study of 1 and 2 Corinthians in relation to a vast topic—the Greek mystery religions and the figure of the mystagogue, who would lead an initiate into esoteric knowledge. Ballard’s volume makes a compelling case that Paul incorporates the trope of the itinerant mystagogue into his self-presentation to the Corinthian community. Anyone interested in Paul’s use of mystery language in 1 and 2 Corinthians should read this book.