XIII.

(1) And the Lord spake unto Moses and Aaron.--As laws of leprosy chiefly concerned the priests, who had to examine the symptoms and to decide whether they indicated the distemper or not, the Lord addressed the regulations to Aaron as well as to Moses. The leprosy discussed in this and the following chapters consists of three general classes: viz., (1) leprosy of man (Leviticus 13:2-46); (2) leprosy of garments (Leviticus 13:47-59); and (3) leprosy of houses (Leviticus 14:33-57).

When a man shall have in the skin of his flesh.--In discussing the leprosy of man, the lawgiver enumerates six different circumstances under which it may develop itself. The first circumstance adduced in Leviticus 13:2-6 is of its developing itself without an apparent cause. Hence it was enjoined that if anyone should notice in the skin of his flesh a rising or swelling, he should be taken to the priest. As the description of these symptoms is very concise, and requires to be specified more minutely for practical purposes, the spiritual guides of Israel, who had to explain the law to the priests during the second Temple, and who came in personal contact with this distemper, defined them as follows :--

A rising.--That is, a swelling, or swollen spot.

Or bright spot.--That is, a bright or glossy pimple. But these symptoms, when indicative of leprosy, assume respectively one of two colours, a principal or a subordinate colour. The principal colour of the rising spot is like that of an egg-shell, and the secondary one resembles white wool; whilst the principal colour of the bright pimple is white as snow, and the subordinate resembles plaster on the wall.

Then he shall be brought unto Aaron.--The following rules obtained during the second Temple with regard to the examination of the patient. Though anyone may examine the disease except the patient himself or his relations, yet the priest alone can decide whether it is leprosy or not, because the law declares that the priests must decide cases of litigation and disease (Deuteronomy 21:5); hence the patient must "be brought unto Aaron," &c. But though the priests only can pronounce the patient clean or unclean, even if he be a child or a fool, yet he must act upon the advice of a learned layman in those matters. If the priest is blind of one eye, or is weak-sighted, he is disqualified for examining the distemper. The inspection must not take place on the Sabbath, nor early in the morning, nor in the middle of the day, nor in the evening, nor on cloudy days, because the colour of the skin cannot properly be ascertained in those hours of the day; but it must take place in the third, fourth, fifth, seventh, eighth, and ninth hours.

UNCLEANNESS DERIVED FROM LEPROSY OR CONTACT WITH LEPERS AND LEPROUS THINGS (chapters 13, 14). A third cause of uncleanness is found in a third class of offensive or repulsive objects. There is no disease which produces so foul an appearance in the human form as leprosy. There was, therefore, no disease so suitable for creating ceremonial, because representing spiritual, uncleanness. The name leprosy has been made to cover a number of diseases similar but not identical in character. There are many spurious forms of leprosy, and many diseases akin to leprosy which do not now come under discussion. The disease here dealt with is elephantiasis, especially in its anesthetic form, which is otherwise called white leprosy. The two varieties of elephantiasis - the tuberculated and the anesthetic - are, however, so closely connected together that they cannot be separated, the one. often running into the other. The first symptom of the malady is a painless spot, which covers an indolent ulcer. This ulcer may continue unprogressive for months or for years, during which the person affected is able to do his ordinary business; but at the end of these periods, whether longer or shorter, it produces a more repulsive and foul disfigurement of the human face and frame than any known disease, the features of the face changing their character, and part of the body occasionally mortifying and dropping off. Death at last comes suddenly, when a vital part of the body has been affected. The home of leprosy has in all ages been Syria and Egypt and the countries adjacent to them, but Europe has not escaped the scourge. In the Middle Ages, no European country was free from it; London had at one time six leper houses; cases were found not unfrequently in Scotland till the middle of the last century; and there was a death certified by medical science to have resulted from leprosy in the city of Norwich in the year 1880. The object of the regulations relating to leprosy is no more sanitary than of those relating to unclean meats. Like the latter, they may have served a sanitary purpose, for leprosy is, according to the prevailing medical opinion, slightly, though only slightly, contagious. Because leprosy was hideous and foul, it therefore made the man affected by it unclean, and before he could be restored to communion with God and his people, he must be certified by God's priest to be delivered from the disease. As in the previous cases, physical ugliness and defilement represent spiritual depravity and viciousness. "The Levitical law concerning leprosy reveals to us the true nature of sin. It shows its hideousness and its foulness, and fills us with shame, hatred, and loathing for it. And it reveals to us the inestimable benefit which we have received from the incarnation of the Son of God, 'the Sun of Righteousness, with healing in his wings' (Malachi 4:2); and fills us with joy, thankfulness, and love to him for his infinite goodness to us" (Wordsworth). Leprosy, the most loathsome of all common diseases, is the type and symbol of sin, and the ceremonial uncleanness attaching to it is a parable of the moral foulness of sin.

13:1-17 The plague of leprosy was an uncleanness, rather than a disease. Christ is said to cleanse lepers, not to cure them. Common as the leprosy was among the Hebrews, during and after their residence in Egypt, we have no reason to believe that it was known among them before. Their distressed state and employment in that land must have rendered them liable to disease. But it was a plague often inflicted immediately by the hand of God. Miriam's leprosy, and Gehazi's, and king Uzziah's, were punishments of particular sins; no marvel there was care taken to distinguish it from a common distemper. The judgment of it was referred to the priests. And it was a figure of the moral pollutions of men's minds by sin, which is the leprosy of the soul, defiling to the conscience, and from which Christ alone can cleanse. The priest could only convict the leper, (by the law is the knowledge of sin,) but Christ can cure the sinner, he can take away sin. It is a work of great importance, but of great difficulty, to judge of our spiritual state. We all have cause to suspect ourselves, being conscious of sores and spots; but whether clean or unclean is the question. As there were certain marks by which to know it was leprosy, so there are marks of such as are in the gall of bitterness. The priest must take time in making his judgment. This teaches all, both ministers and people, not to be hasty in censures, nor to judge anything before the time. If some men's sins go before unto judgment, the sins of others follow after, and so do men's good works. If the person suspected were found to be clean, yet he must wash his clothes, because there had been ground for the suspicion. We have need to be washed in the blood of Christ from our spots, though not leprosy spots; for who can say, I am pure from sin?And the Lord spake unto Moses and unto Aaron,.... Aaron is addressed again, though left out in the preceding law, because the laws concerning leprosy chiefly concerned the priests, whose business it was to judge of it, and cleanse from it; and so Ben Gersom observes, mention is made of Aaron here, because to him and his sons belonged the affair of leprosies, to pronounce unclean or clean, to shut up or set free, and, as Aben Ezra says, according to his determination were all the plagues or strokes of a man, who should be declared clean or unclean:

saying; as follows.