Thomas Watson (c. 1620-1686) was an English Puritan preacher and author who served as vicar of St. Stephen's Walbrook in London. Renowned for his practical and devotional writings, Watson played a key role in promoting Reformed theology in England during a time of great religious and political upheaval. His works, characterized by profound spiritual insight, vivid illustration, and warm application, continue to be treasured by Christians around the world.