How do Calvin and Martin Luther have different ideas?

Calvin and Martin Luther both played pivotal roles in the Protestant Reformation, but they had differing theological views. Luther emphasized justification by faith alone and the authority of Scripture, advocating for a more personal relationship with God. In contrast, Calvin introduced the concept of predestination and a more structured church governance, believing that God's sovereignty extends to all aspects of life. These differences reflect their distinct interpretations of salvation and the role of the church in believers' lives.