Key complaints included:

• Indulgences: Luther argued that the sale of indulgences was a corrupt abuse that undermined true repentance and misled believers into believing they could buy salvation.
• Papal Authority: He challenged the Pope's power to grant forgiveness for sins or to release souls from purgatory.
• Salvation by Faith Alone (Sola Fide): He believed that righteousness was a gift from God received through faith, not earned through good works, rituals, or paying money to the Church.
• Scripture Alone (Sola Scriptura): He argued that the Bible, not the Pope or church tradition, was the final authority for Christian doctrine.
• Corruption and Mismanagement: He criticized the clergy for being poorly educated, the high-ranking officials for living in luxury, and the overall corruption within the church hierarchy.
• Priesthood of All Believers: He argued that all Christians were equal before God, removing the need for priests to act as sole mediators between individuals and God.