Sometimes one word is all that stands between the truth and a lie, between life and death. In the Reformation, that word was sola, “alone.” At a time when leaders in the church claimed to speak for God, the Protestant Reformers reminded God’s people that Scripture alone is our infallible authority. While many people sought to work their way to heaven, the Reformers boldly proclaimed the only true gospel: salvation is by God’s grace alone, through faith alone, in Christ alone, to the glory of God alone.