John Owen (1616-1683) was an English theologian and a prominent figure in the Puritan movement. He is best known for his writings on Reformed theology and his emphasis on the importance of personal piety and the work of the Holy Spirit. Owen served as the chaplain to Oliver Cromwell and was involved in the political and religious life of his time. Owen authored several influential works, including "The Mortification of Sin" and "The Glory of Christ." His writings have had a lasting impact on Christian thought and continue to be studied by theologians and scholars today. Owen's contributions to Puritan literature and his deep theological insights remain significant in the history of Christianity.