Augsburg Interrogation (1518)

In October 1518, Martin Luther, an Augustinian friar and professor from Wittenberg, was summoned to Augsburg in the Holy Roman Empire to answer for his growing challenge to the preaching of indulgences. There he met Cardinal Thomas de Vio, called Cajetan, a learned Dominican and papal legate. Cajetan pressed Luther to submit to the church’s judgment; Luther, fearing that the gospel itself was being obscured, refused to recant unless convinced from Scripture and sound teaching. His willingness to stand at personal cost showed moral courage, even as Cajetan’s firm insistence on order reflected a different kind of duty-bound resolve. Luther departed Augsburg under tension, and Europe watched.

Cum postquam (9 November 1518)

Pope Leo X responded by issuing the bull Cum postquam. Written in the wake of Augsburg, it reaffirmed that the church could grant indulgences from the “treasury of merits” of Christ and the saints. These indulgences were said to apply to the living and the dead, while carefully distinguishing the remission of temporal penalties from the forgiveness of guilt. In other words, the bull defended the claim that indulgences addressed punishments remaining after guilt was forgiven, rather than replacing repentance or the mercy of God.

The document aimed to steady wavering consciences: troubled believers were not to be tossed about by fear, rumor, or spiritual confusion. It also defended ecclesial authority at a moment when public disputation threatened to fracture Christian unity.

Legacy for Conscience and Preaching

Yet the controversy exposed a pressing need that reaches beyond its era: forgiveness must be proclaimed with unmistakable reliance on Christ’s mercy and sincere repentance—not worldly bargaining, but humble trust. “For it is by grace you have been saved through faith… it is the gift of God, not by works, so that no one can boast” (Ephesians 2:8–9). And, “If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness” (1 John 1:9).

Cum postquam stands as a historical attempt to define disputed terms and protect the faithful, while also reminding every age that true Christian confidence rests not in transactions, but in the crucified and risen Lord, received with repentance, faith, and reverent obedience.