But when we now seek to ascertain upon what principle certain animals were permitted and others forbidden as food, it must be confessed that we have before us a very difficult question, and one to which, accordingly, very diverse answers have been given. In general, indeed, we are expressly told that the object of this legislation, as of all else in this book of laws, was moral and spiritual. Thus, we are told in so many words (vv. 43-45) that Israel was to abstain from eating or touching the unclean, on the ground that they were to be holy, because the Lord their God was holy. But to most this only increases the difficulty. What possible connection could there be between eating, or abstinence from eating, animals which do not chew the cud, or fishes which have not scales, and holiness of life?
In answer to this question, some have supposed a mystical connection between the soul and the body, such that the former is defiled by the food which is received and assimilated by the latter. In support of this theory, appeal has been made to ver. 44 of this chapter, which, in the Septuagint translation, is rendered literally: "Ye shall not defile your souls." But, as often in Hebrew, the original expression here is simply equivalent to our compound pronoun "yourselves," and is therefore so translated both in the Authorised and the Revised Versions. As for any other proof of such a mystical evil influence of the various kinds of food prohibited in this chapter, there is simply none at all.
Others, again, have sought the explication of these facts in the undoubted Divine purpose of keeping Israel separate from other nations; to secure which separation this special dietetic code, with other laws regarding the clean and the unclean, was given them. That these laws have practically helped to keep the children of Israel separate from other nations, will not be denied; and we may therefore readily admit, that inasmuch as the food of the Hebrews has differed from that of the nations among whom they have dwelt, this separation of the nation may therefore have been included in the purpose of God in these regulations. However, it is to be observed that in the law itself the separation of Israel from other nations is represented, not as the end to be attained by the observance of these food laws, but instead, as a fact already existing, which is given as a reason why they should keep these laws (xx. 24, 25). Moreover, it will be found impossible, by reference to this principle alone, to account for the details of the laws before us. For the question is not merely why there should have been food laws, but also why these laws should have been such as they are? The latter question is not adequately explained by reference to God's purpose of keeping Israel separate from the nations.
Some, again, have held that the explanation of these laws was to be found simply in the design of God, by these restrictions, to give Israel a profitable moral discipline in self-restraint and control of the bodily appetites; or to impose, in this way, certain conditions and limitations upon their approach to Him, which should have the effect of deepening in them the sense of awe and reverence for the Divine majesty of God, as their King. Of this theory it may be said, as of the last-named, that there can be no doubt that in fact these laws did tend to secure these ends; but that yet, on the other hand, the explanation is still inadequate, inasmuch as it only would show why restrictions of some kind should have been ordered, and not, in the least, why the restrictions should have been such, in detail, as we have here.
Quite different from any of these attempted explanations is that of many who have sought to explain the law allegorically. We are told by such that Israel was forbidden the flesh of certain animals, because they were regarded as typifying by their character certain sins and vices, as, on the other hand, those which were permitted as food were regarded as typifying certain moral virtues. Hence, it is supposed by such that the law tended to the holiness of Israel, in that it was, so to speak, a continual object-lesson, a perpetually acted allegory, which should continually remind them of the duty of abstaining from the typified sins and of practising the typified virtues. But, assuredly, this theory cannot be carried out. Animals are in this law prohibited as food whose symbolic meaning elsewhere in Scripture is not always bad, but sometimes good. The lion, for example, as having paws, is prohibited as food; and yet it is the symbol of our blessed Lord, "the Lion of the tribe of Judah." Nor is there the slightest evidence that the Hebrews ever attached any such allegorical significance to the various prescriptions of this chapter as the theory would require.