But precautions against idolatry are not exhausted by the war declared upon men who might attempt to lead the Israelite into evil. Besides insidious human enemies, there were also insidious customs originating in heathenism, and still redolent of idolatry even when they were severed from any overt connection with it. Ancient rituals, ancient superstitions, hateful remnants of bloodthirsty pagan rites, were being revived in the Deuteronomist's day on every hand, because faith in the higher religion that had superseded them had been shaken. Like streams from hidden reservoirs suddenly reopened, idolatrous and magical practices were overflowing the land, and were finding in popular customs, harmless in better days, channels for their return into the life of those who had formerly risen above them.
Some of these were more hurtful than others, and two are singled out at the beginning of chapter xiv. as those which a people holy unto Yahweh must specially avoid: "Ye shall not cut yourselves, nor make any baldness between your eyes for the dead." The grounds for avoiding these practices are first given, and we may probably assume that they are the grounds also for the other enactments which follow. They are these: "Ye are the children of Yahweh your God," and "Thou art a holy people unto Yahweh thy God, and Yahweh hath chosen thee to be a peculiar people unto Himself, out of all peoples that are upon the face of the earth." The last of these reasons is common to the Exodus code with Deuteronomy, and comes even more prominently into view in the Levitical law. Just as Yahweh alone was to be their God, they alone were to be Yahweh's people, and they were to be holy to Him, _i.e._ were to separate themselves to Him; for in its earliest meaning to be holy is simply to be separate to Yahweh. This whole dispensation of law, that is, was meant to separate the people of Israel from the idolatrous world, and in this separation we have the key to much that would otherwise be hard to comprehend. Looked at from the point of view of revelation, petty details about tonsure, about clean and unclean animals, and so on, seem incredibly unworthy; and many have said to themselves, How can the God of the whole earth have really been the author of laws dealing with such trivialities? But when we regard these as provisions intended to secure the separation of the chosen people, they assume quite another aspect. Then we see that they had to be framed in contrast to the idolatries of the surrounding nations, and are not meant to have further spiritual or moral significance.
But the first reason given is a higher and more important one, which occurs here for the first time in Deuteronomy: "Ye are the children of Yahweh your God." In heathen lands such a title of honour was common, because physically most worshippers of false gods were regarded as their children. But in Israel, where such physical sonship would have been rejected with horror as impairing the Divine holiness, the spiritual sonship was asserted of the individual much more slowly. In Yahweh's command to Moses to threaten Pharaoh with the death of his firstborn son, and in Hosea xi. 1, Israel collectively is called Yahweh's firstborn and His son. In Hosea i. 10 it is prophesied that in the Messianic time, "in the place where it was said unto them, Ye are not My people, it shall be said unto them, Ye are the sons of the living God." But here for the first time this high title is bestowed upon the actual individual Israelites. It was perhaps implied in the Deuteronomist's view of God's fatherly treatment of the nation in the desert, and still more in his demand for the love of the individual heart. Yet only here is it brought plainly forth as a ground for the regulation of life according to Yahweh's commands. Each son of Israel is also a son of God; and by none of his acts or habits should he bring disgrace upon his spiritual Father. Likeness to God is expected and demanded of him. It is his function in the world to represent Him, to give expression to the Divine character in all his ways. This is the Israelite's high calling, and the religious application of _noblesse oblige_ to such matters as follow, gives a dignity and importance to all of them such as in their own nature they could hardly claim.