James Henley Thornwell (1812-1862) was a leading pastor and theologian of the Presbyterian Church in the United States of America (Old School). On May 18, 1956, at the First Presbyterian Church of New York City, he preached this sermon on John 10:17-18. After expounding the Father’s covenantal commandment to His Son and the Son’s willing sacrifice on the cross for the glory of the Father and the salvation of the elect, Thornwell applies the cross of Christ to the church’s missionary work. He eloquently shows how the sacrifice of Jesus is the type and model of missionary effort, making clear that “the spirit of missions is the spirit of the gospel.” A Foreword by Dr. Craig Sheppard introduces Thornwell to the reader.