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pagan rites, were being revived in the Deuteronomist's day on every hand, because faith in the higher religion that had superseded them had been shaken.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.

"Ye shall not cut yourselves, nor make any baldness between your eyes for the dead." Israel was not to express grief for the dead in these ways, first because that was the custom of other nations, and secondly still more because the origin and meaning of such rites was idolatrous, and as such altogether unworthy of Yahweh's sons. "Both," says Robertson Smith, "occur not only in mourning, but in the worship of the gods, and belong to the sphere of heathen superstition."[77] Elsewhere he explains the cutting of themselves to be the making of a blood covenant with the dead, just as the priests of Baal in their worship tried to get their god to come to their help by making a covenant of blood with him at his altar.[78] This naturally tended to bring in the superstitions of necromancy, and opened the way also for the worship of the dead. Many traces of its previous existence among the Israelite tribes are to be found in the Scriptures; and the probability is that as ancestor-worship ruled the life and shaped the thoughts of Greeks and Romans till Christianity appeared, so Yahwism alone had broken its power over Israel. But such superstitions die hard, and in the general recrudescence of almost forgotten forms of heathenism at this time, this cult may very well have been reasserting itself. As for the shaving of the front part of the head, that had a precisely similar import. "It had exactly the same sense as the offering of the mourner's blood."[79] "When the hair of the living is deposited with the dead, and the hair of the dead remains with the living, a permanent bond of connection unites the two."

The prohibition as food of the animals and birds called "unclean" was another measure obviously of the same nature as the prohibition of heathen mourning practices; but in its details it is more difficult to explain. Probably, however, it was a more potent instrument of separation than any other. In India to-day the gulf between the flesh-eater and the orthodox vegetarian Hindu is utterly impassable; and in the east of Europe and in Palestine, where the Jewish restrictions as to food are still regarded, the orthodox Jew is separated from all Gentiles as by a wall. In travelling he never appears at meals with his fellow-travellers. All the food he requires he carries with him in a basket; and at every place where he stops it is the duty of the Jewish community to supply him with proper food, that he may not be tempted to defile himself with anything unclean. But it is very difficult for us now to bring the individual prohibitions under one head, and it seems impossible to explain them from any one point of view.

Some of the animals and birds prohibited were probably, then, animals eaten in connection with idolatrous feasts by the neighbouring heathen. Isa. lxv. 4 shows that swine's flesh was eaten at sacrificial meals by idolaters, and from the expression "broth of abominable things is in their vessels" it is clear that the flesh of other animals was so used. All these would necessarily be prohibited to Israel; but beyond a few, such as the swine, which was sacrificed to Tammuz or Adonis, and the mouse and the wild ass, we have no means of knowing what they were. That this is a vera causa of such prohibitions is shown by the facts mentioned by Professor Robertson Smith, that "Simeon Stylites forbade his Saracen converts to eat the flesh of the camel, which was the chief element in the sacrificial meals of the Arabs, and our own prejudice against the use of horse-flesh is a relic of an old ecclesiastical prohibition framed at the time when the eating of such food was an act of worship to Odin." The very ancient and stringent prohibition of blood as an article of diet is probably to be accounted for in this way also. Blood was eaten at heathen sacrificial feasts; without other reason that would be sufficient. These are the general lines which must have determined the list of clean animals in the view of the lawgiver, since he brings them in under the head of idolatry and under the two general grounds we have discussed (p. 289, supra).

Jewish writers, however, especially since Maimonides, have regarded these prohibitions as aiming primarily at sanitary ends, and as a proof of their efficacy have adduced the unusually high average health of the Jews, and their almost complete exemption from certain classes of disease. No such point of view is suggested in the Scriptures themselves, for it would surely be rather farfetched to class possible disease as an infringement of the holiness demanded of Israel, or as a thing unworthy of Yahweh's sons. Nevertheless a general view of the list of clean animals here given would support the idea that sanitary considerations also had something to do with the classification. The practical effect of the rule laid down is to exclude all the carnivora among quadrupeds, and so far as we can interpret the nomenclature, the raptores among birds.[80] "Amongst fish, those which were allowed contain unquestionably the most wholesome varieties." Further, the nations of antiquity which developed such categories of clean and unclean animals seem in the main to have taken the same line. The ground of this probably is the natural disgust with which unclean feeders are always regarded. Animals and birds especially which feed, or may be supposed to feed, on carrion, are everywhere disliked, and as a rule they are unsuitable for food. Grass-eating animals, on the other hand, are always regarded as clean. Scaleless fish, too, are generally more or less slimy to the touch, and with them reptiles are altogether forbidden. All this seems to show that a natural sentiment of disgust, for whatever reason felt, was active in the selection of the animals marked unclean by men of every race. The pre-Mosaic customary law on this subject would, of course, have this characteristic in common with similar laws of primitive nations. When the worship of Yahweh was introduced, most of this would be taken over, only such modifications being introduced as the higher religion demanded. In some main elements, therefore, the Mosaic law on this subject would be a repetition of what is to be found elsewhere. Hence a general tendency to health may be expected; for besides the guidance which healthy disgust would give, a long experience must also have been registered in such laws. The influence of them in promoting health has recently been acknowledged by the Lancet; and though that reason for observing them is not mentioned in Scripture, we may view it as a proof that the Jewish legislators were under an influence which brought them, perhaps even when they knew it not, into relation with what was wholesome in the practices and customs of their place and time.

Beyond these three reasons for the laws regarding food, all is the wildest speculation. If other reasons underlie these laws, we cannot now ascertain what they were. For a time it was the custom to ascribe the Jewish laws to Persian influence, though from the nature of the case such laws must have been part of the heritage of Israel from pre-Mosaic time. Even to-day Jewish writers ascribe them to the evil effect which bad food has upon the soul, either by infecting it with the characteristics of the unclean beasts, or by rendering it impenetrable to good influences.[81] But, as usual, it is the allegorical interpreters who carry off the palm. Animals that chew the cud were to be eaten, because they symbolised those who "read, mark, learn, and inwardly digest" the Divine law: those which divide the hoof are examples of those who distinguish between good and bad actions; and in the ostrich one interpreter finds an analogue to the bad commentators who pervert the words of Holy Scripture.

Hitherto in chapter xiv. we have been dealing with material to which a parallel can be found only in the small code of laws contained in Lev. xvii.-xxvi., commonly called the Law of Holiness, and in the Priestly Code.[82] But the two remaining directions regarding food, which are contained in the twenty-first verse are parallel to prohibitions in the Law of the Covenant. The first, "Ye shall not eat of anything that dieth of itself ... for thou art an holy people unto Yahweh thy God," is parallel to Exod. xxii. 31. "And ye shall be holy men unto Me: therefore ye shall not eat any flesh that is torn of beasts in the field," and to Lev. xvii. 15, "Every soul that eateth that which dieth of itself, or that which is torn of beasts, whether he be homeborn or a stranger, he shall wash his clothes, and bathe himself in water, and be unclean until the evening." The ground for prohibiting such food, was, of course, that the blood was in it. But there is a divergence between the parallel laws, which is seen clearly when we take into account the destination of the flesh of the animal so dying. In Exodus it is said, "To the dogs shall ye cast it." In Deuteronomy the command is, "To the stranger within thy gates ye shall give it, and he shall eat of it, or ye may sell it unto a foreigner." In Leviticus it is taken for granted that an Israelite and also a stranger may eat either of the nebhelah, that which dieth of itself, or the terephah, that which is torn; and if either do so it is prescribed only that he should wash, and should be unclean until the evening.

Here, therefore, we have one of the cases in which the traditional hypothesis—that the Law of the Covenant was given at Sinai when Israel arrived there, the laws of the Priestly Code probably not many weeks after, and the code of Deuteronomy only thirty-eight or thirty-nine years later, but before the laws had come fully into effect by the occupation of Canaan—raises a difficulty. Why should the Sinaitic law say that terephah is not to be eaten by any one, but cast to the dogs, and the Levitical law in so short a time after make the eating of that and nebhelah mere cause of subordinate uncleanness to both Israelite and stranger, while Deuteronomy permits the Israelite either to give the nebhelah to the stranger that he may eat it, or to make it an article of traffic with the foreigner? Keil's explanation is certainly feasible, that in Exodus we have the law, in Leviticus the provision for accidental, or perhaps wilful, disobedience of it under the pressure of hunger, while in Deuteronomy we have a permission to sell, lest on the plea of waste the law might be ignored. But the position of the "gēr," or stranger, is not accounted for. In Leviticus he is bound to the worship of Yahweh, and can no more eat nebhelah or terephah than the native Israelite can, while in Deuteronomy he is on a lower stage than the Israelite as regards ceremonial cleanness, and much on the same level as the nokhri, the foreigner, who in Deuteronomy is dealt with as an inferior, not bound to the same scrupulosity as the Israelite (Deut. xv. 3, 23, 29). There does not appear to be any explanation of such a change in less than forty years; more especially as the moment at which the change would on that hypothesis be made was precisely the moment when the stranger was about for the first time to become an important element in Israelite life. If, on the other hand, the order of the codes be Exodus, Deuteronomy, Leviticus, then the Exodus law, which does not consider the stranger, would suit the earliest stage of Israel's history, when the stranger would generally be a spy. Later, he crept into Israelite life, and gradually received more and more consideration; especially in the days of Solomon, when the Chronicler estimates the number of the strangers at over a hundred and fifty thousand. But he was not recognised at that stage as fully bound to all an Israelite's duties, or as possessed of all an Israelite's privileges, and that is precisely the position he occupies in Deuteronomy. In the Priestly Code, however, at a time when the stranger had practically become a proselyte, the ideal Kingdom of God includes the "stranger," and gives him a position which differs little from that of the homeborn. That would make these different laws answer to different periods of Israel's history, and would coincide with what has been otherwise found to be the order of Israel's legal development.