John Knox (c.1514–1572) was a fiery preacher, bold reformer, and fearless defender of truth whose voice shook the nation of Scotland. Known as the father of the Scottish Reformation, Knox’s uncompromising faith and thunderous preaching helped turn an entire country from darkness to light, grounding it firmly on the Word of God.

Knox was born around 1514 near Haddington, Scotland, and educated at the University of St. Andrews. Trained for the priesthood, he was ordained as a Catholic priest in his twenties. Yet beneath his formal religion, Knox hungered for something deeper—truth that could satisfy both the mind and heart. That truth found him in the writings of Martin Luther and John Wycliffe, and through the preaching of the Scottish reformer George Wishart, whose message of salvation by grace through faith ignited revival across Scotland.Knox became Wishart’s close companion and bodyguard, carrying a two-handed sword to protect the gentle preacher. But in 1546, Wishart was captured and executed for heresy, burned at the stake by church authorities. Watching his mentor die for the gospel left an indelible mark on Knox’s soul. From that day forward, he resolved to take up Wishart’s cause—to preach the truth, no matter the cost.

Knox soon joined the Protestant movement at St. Andrews, where he began preaching with remarkable power. His courage quickly made him a target. In 1547, the French army—then allied with Scotland’s Catholic leaders—captured the castle at St. Andrews. Knox was taken prisoner and forced to labor as a galley slave aboard a French ship for nearly two years. Chained to an oar, beaten, and half-starved, he clung to his faith. When asked if he still believed Christ would deliver him, Knox famously pointed toward the coast of Scotland and said, “Yes, I see the steeple of that place where God shall once more call me to preach His Word.”

He was right. After his release, Knox spent several years in exile in England and then Geneva, where he met John Calvin and was deeply influenced by his teachings on Scripture and church order. Knox returned to Scotland in 1559, where his fiery sermons ignited a nationwide reformation. His preaching, rooted in Scripture and filled with passion, denounced corruption, idolatry, and tyranny. Crowds gathered by the thousands, and soon Scotland broke from Rome, embracing the gospel and establishing the Reformed Church of Scotland.

Knox’s fearless confrontation with rulers became legendary. When Queen Mary of Scots summoned him, hoping to intimidate him, Knox stood firm. He told her that kings and queens, like all people, must bow before Christ’s authority.

Though constantly threatened and often ill, Knox never lost his boldness. In his final years, weakened by sickness, he continued preaching until he could no longer stand—then had himself carried to the pulpit.

John Knox died in 1572. As his coffin was lowered into the ground, one nobleman declared, “Here lies one who never feared the face of man.”

Knox’s voice has long been silent, but his message still resounds: that the Word of God is the power of God, and that no human authority can stand against the truth of Christ.