 Calvin developed his theology in his biblical commentaries as well as his sermons and treatises, but the most comprehensive expression of his views is found in his magnum opus, the "Institutes of the Christian Religion".He intended that the book be used as a summary of his views on Christian theology and that it be read in conjunction with his commentaries.The various editions of that work spanned nearly his entire career as a reformer, and the successive revisions of the book show that his theology changed very little from his youth to his death.