The Protestant Reformation was a significant 16th-century religious and theological movement that sought to purify the Church by rejecting certain Roman Catholic practices and doctrines, emphasizing instead the supreme authority of Scripture and the grace of God through faith in Christ. While Reformed traditions emphasize the recovery of gospel truths, they acknowledge that the era brought about lasting denominational distinctions regarding governance, worship, and the sacraments.
The Reformation, initiated in 1517 by figures like Martin Luther, was fundamentally a struggle for the "Christian Heritage" against what was perceived as the corruption of the gospel. At its heart was the realization that the Church had become obscured by human traditions and the misuse of authority. As noted in the Ninety-Five Theses, the focus shifted from purchasing pardons or indulgences to the sufficiency of Christ's work. The Formula of Concord: Solid Declaration emphasizes that this movement was not about inventing new doctrine but returning to the "chief articles" of the Christian religion, purified by the Word of God. The primary aim was to dispense with sacerdotalism and unveil the glories of the Cross, as described in Abraham Kuyper's Lectures on Calvinism.
A hallmark of the Reformation was the rejection of human primacy in the Church, specifically the authority of the Pope. The Second Helvetic Confession argues that "the Church cannot have any other head besides Christ" and that he remains the only universal pastor and highest Pontiff. This doctrine of Christ's headship grounded the Reformed conviction that the Church is governed by the Spirit and the Word, not by human office or earthly hierarchy. It fundamentally altered the understanding of the believer's direct access to God, leading to a new appreciation for the "priesthood of all believers" and the authority of the Scriptures over and against tradition.