For 450 years, churches throughout the world have been using the Heidelberg Catechism (1563) to instruct God's people in foundational Christian doctrine. When Elector Frederick III (1515 1576) commissioned the preparation of a manual for instructing the youth and guiding the pastors and teachers of his domain, he could not have imagined the profound effect it would have on future generations of Christians. The most widely used, most influential Reformation catechism, the "Heidelberger" shines forth the blessed truths of the gospel in 129 questions and answers, beginning with the memorable, ever-enduring subject of our "only comfort in life and in death." In A Faith Worth Teaching, edited by Jon Payne and Sebastian Heck, an array of faithful pastor-scholars celebrate the Heidelberg Catechism on its 450th anniversary with a collection of essays on its dynamic history, rich theology, and fruit-bearing practice that will be an encouragement to pastors and laypersons alike.