No less needful is the lesson of this law to many who are at the opposite extreme. For as there are those who are so taken up with the soul and its health, that they ignore its relation to the body, and the bearing of bodily conditions upon character; so there are others who are so preoccupied with questions of bodily health, sanitation and hygiene, regarded merely as prudential measures, from an earthly point of view, that they forget that man has a soul as well as a body, and that such questions of sanitation and hygiene only find their proper place when it is recognised that health and perfection of the body are not to be sought merely that man may become a more perfect animal, but in order that thus, with a sound mind in a sound body, he may the more perfectly serve the Lord in the life of holiness to which we are called. Thus it appears that this forgotten law of the clean and the unclean in food, so far from being, at the best, puerile, and for us now certainly quite useless, still teaches us the very important lesson that a due regard to wholeness and health of body is essential to the right and symmetrical development of holiness of character. In every dispensation, the law of God combines the bodily and the spiritual in a sacred synthesis. If in the New Testament we are directed to glorify God in our spirits, we are no less explicitly commanded to glorify God in our bodies (1 Cor. vi. 20). And thus is given to the laws of health the high sanction of the Divine obligation of the moral law, as summed up in the closing words of this chapter: "Be ye holy; for I am holy." This law concerning things unclean, and clean and unclean animals, as thus expounded, is also an apologetic of no small value. It has a direct and evident bearing on the question of the Divine origin and authority of this part of the law. For the question will at once come up in every reflecting mind: Whence came this law? Could it have been merely an invention of crafty Jewish priests? Or is it possible to account for it as the product merely of the mind of Moses? It appears to have been ordered with respect to certain facts, especially regarding various invisible forms of noxious parasitic life, in their bearing on the causation and propagation of disease,--facts which, even now, are but just appearing within the horizon of modern science. Is it probable that Moses knew about these things three thousand years ago? Certainly, the more we study the matter, the more we must feel that this is not to be supposed.