3. The principal part of the divine will, as expressed in the law, is that connected with sacrifice. Sacrifice occupies the central place in the book, and in the history it records. In this book the temple service, thinly disguised as the service of the tabernacle in the wilderness, is set forth as the great end and aim for which God created the world, settled the nations in it, and called Israel to be a people. The ritual which was observed from the exile to the destruction of Jerusalem may be studied in Exodus and Leviticus. We read of orders and companies of priests who offer daily and other sacrifices according to a rule in which the smallest details are carefully arranged, sacrifices in which little of the old cheerful common meal now lingers, but which are mostly of a purificatory or piacular character. The ritual of sacrifice would not appear to an outward observer to differ very much from that in use among the Greeks or Romans; the Jews certainly conducted it on a larger scale. What end precisely was aimed at in it, the Jew would have found it perhaps hard to say. It was done, he would say, because the law so ordered it, and the law must be obeyed even if one did not quite understand what was enjoined. The daily sacrifice removed the impurity of the temple staff, and enabled the people to be sure that the favour of the deity continued with them. Many sacrifices aimed at the removal of particular sins; thankfulness also was expressed in them, and other feelings may also have ascended with the smoke from the altar. To Jews living at a distance the sacrifice, which could be offered nowhere but at Jerusalem, was the chief symbol, the great mystery, of their faith.