The publication of the book of Deuteronomy was nothing less than a providence in the development of Hebrew religion. It was accompanied, of course, by incidental and perhaps inevitable evils. By its centralization of worship at the Jerusalem temple, it tended to rob life in other parts of the country of those religious interests and sanctions which had received their satisfaction from the local sanctuaries; and by its attempt to regulate by written statute the religious life of the people, it probably contributed indirectly to the decline of prophecy, and started Israel upon that fatal path by which she ultimately became "the people of the book." But on the other hand, the service rendered to religion by Deuteronomy was incalculable. The worship of Jehovah had been powerfully corrupted from two sources; on the one hand, from the early influence of the Canaanitish Baal worship, practically a nature-worship, which set morality at defiance, xxiii. 18; and on the other, from her powerful Assyrian conquerors. Idolatry not only covered the whole land, it had penetrated the temple itself (2 Kings xxiii. 6). The cause of true religion was at stake. There had been sporadic attempts at reform, but Deuteronomy, for the first time, struck at the root by rendering illegal the worship--nominally a Jehovah, but practically a Baal worship--which was practised at the local sanctuaries. Again Deuteronomy rendered a great service to religion, by translating its large spirit into demands which could be apprehended of the common people. The book is splendidly practical, and formed a perhaps not unnecessary supplement to the teaching of the prophets. Society needs to have its ideals embodied in suggestions and commands, and this is done in Deuteronomy. The writers of the book legislate with the fervour of the prophet, so that it is not so much a collection of laws as "a catechism of religion and morals." Doubtless the prophets had done the deepest thing of all by insisting on the new heart and the return to Jehovah, but they had offered no programme of practical reform. Just such a programme is supplied by Deuteronomy, and yet it is saved from the externalism of being merely a religious programme by its tender and uniform insistence upon the duty of loving Jehovah with the whole heart.