In this Reformation Sunday message, Tim Messmer shares Pastor Erwin Lutzer's powerful sermon about Martin Luther and the birth of Protestant Christianity. The sermon traces Luther's journey from a terrified young monk desperately seeking God's approval through strict religious practices, to his revolutionary understanding that salvation comes through faith alone in Christ. Through Luther's personal struggles and eventual discovery of "justification by faith" in the book of Romans, Messmer illustrates how this 500-year-old story remains deeply relevant to modern Christians. The message culminates with Luther's famous 95 Theses and the dramatic events that sparked the Protestant Reformation, reminding listeners that salvation is not earned through works but received as a gift through faith in Christ.