1 And the LORD spake unto Moses and Aaron, saying,
2 When a man shall have in the skin of his flesh a rising, a scab, or a bright spot, and it be in the skin of his flesh like the plague of leprosy; then he shall be brought unto Aaron the priest, or unto one of his sons the priests:
3 And the priest shall look on the plague in the skin of the flesh: and when the hair in the plague is turned white, and the plague in sight be deeper than the skin of his flesh, it is a plague of leprosy: and the priest shall look on him, and pronounce him unclean.
4 If the bright spot be white in the skin of his flesh, and in sight be not deeper than the skin, and the hair thereof be not turned white; then the priest shall shut up him that hath the plague seven days:
5 And the priest shall look on him the seventh day: and, behold, if the plague in his sight be at a stay, and the plague spread not in the skin; then the priest shall shut him up seven days more:
6 And the priest shall look on him again the seventh day: and, behold, if the plague be somewhat dark, and the plague spread not in the skin, the priest shall pronounce him clean: it is but a scab: and he shall wash his clothes, and be clean.
7 But if the scab spread much abroad in the skin, after that he hath been seen of the priest for his cleansing, he shall be seen of the priest again:
8 And if the priest see that, behold, the scab spreadeth in the skin, then the priest shall pronounce him unclean: it is a leprosy.
9 When the plague of leprosy is in a man, then he shall be brought unto the priest;
10 And the priest shall see him: and, behold, if the rising be white in the skin, and it have turned the hair white, and there be quick raw flesh in the rising;
11 It is an old leprosy in the skin of his flesh, and the priest shall pronounce him unclean, and shall not shut him up: for he is unclean.
12 And if a leprosy break out abroad in the skin, and the leprosy cover all the skin of him that hath the plague from his head even to his foot, wheresoever the priest looketh;
13 Then the priest shall consider: and, behold, if the leprosy have covered all his flesh, he shall pronounce him clean that hath the plague: it is all turned white: he is clean.
14 But when raw flesh appeareth in him, he shall be unclean.
15 And the priest shall see the raw flesh, and pronounce him to be unclean: for the raw flesh is unclean: it is a leprosy.
16 Or if the raw flesh turn again, and be changed unto white, he shall come unto the priest;
17 And the priest shall see him: and, behold, if the plague be turned into white; then the priest shall pronounce him clean that hath the plague: he is clean.
18 The flesh also, in which, even in the skin thereof, was a boil, and is healed,
19 And in the place of the boil there be a white rising, or a bright spot, white, and somewhat reddish, and it be shewed to the priest;
20 And if, when the priest seeth it, behold, it be in sight lower than the skin, and the hair thereof be turned white; the priest shall pronounce him unclean: it is a plague of leprosy broken out of the boil.
21 But if the priest look on it, and, behold, there be no white hairs therein, and if it be not lower than the skin, but be somewhat dark; then the priest shall shut him up seven days:
22 And if it spread much abroad in the skin, then the priest shall pronounce him unclean: it is a plague.
23 But if the bright spot stay in his place, and spread not, it is a burning boil; and the priest shall pronounce him clean.
24 Or if there be any flesh, in the skin whereof there is a hot burning, and the quick flesh that burneth have a white bright spot, somewhat reddish, or white;
25 Then the priest shall look upon it: and, behold, if the hair in the bright spot be turned white, and it be in sight deeper than the skin; it is a leprosy broken out of the burning: wherefore the priest shall pronounce him unclean: it is the plague of leprosy.
26 But if the priest look on it, and, behold, there be no white hair in the bright spot, and it be no lower than the other skin, but be somewhat dark; then the priest shall shut him up seven days:
27 And the priest shall look upon him the seventh day: and if it be spread much abroad in the skin, then the priest shall pronounce him unclean: it is the plague of leprosy.
28 And if the bright spot stay in his place, and spread not in the skin, but it be somewhat dark; it is a rising of the burning, and the priest shall pronounce him clean: for it is an inflammation of the burning.
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Illness and uncleanness, illness and sin, the connection between them: this is an old and disputed subject. Not so very long ago (by historical standards, of course), leprosy was considered not merely a contagious disease, but also an unclean and defiling one. People appealed precisely to the Book of Leviticus, because everything there is unambiguous. Meanwhile, both then and especially today, a natural question arises: why leprosy in particular?
Yes, leprosy is a contagious disease, but there are others no less dangerous: plague, for example, or smallpox, or cholera, or anthrax. All these diseases were known in antiquity, but for some reason it is leprosy that is especially singled out in the Book of Leviticus. If the problem is reduced only to medicine, to hygiene, to anti-epidemic measures, the question remains unanswered. What, then?
Cholera is a deadly disease, like plague and anthrax. They all kill a person, sometimes painfully, but always comparatively quickly. Often even today, if appropriate medical help is lacking. Death itself, however, in antiquity was not such a problem, as frightening as this may sound to the ear of our contemporary. In antiquity (and in the Middle Ages too) no one "revered life." People simply lived as God gave them to live. In their hour they rejoiced, in their hour they suffered, in their hour they were born, in their hour they died.
The one who wanted to get out of this circle searched for his own path; sometimes he found it, sometimes he did not. Emotions about the brevity of life, or the nearness of death, or anything else of that kind were considered excessive. People rejoiced in concrete joys, grieved concrete griefs, suffered from concrete sufferings, everything in its own time. What was considered truly terrible and senseless was not death, but life in dying.
So leprosy became a symbol precisely of something like that: life in dying. Roughly as cancer has become for us today, especially when it drags on long and painfully and does not end, though cancer was a great rarity in antiquity. Leprosy, however, was far more common than it is in our world today, and it was incurable. A person lived while dying, sometimes for decades, and the question involuntarily arose: why? To answer the question of human sinfulness in such a case is practically impossible, at least for a human being, but to state the fact of uncleanness is quite possible. And this was done, simply on the basis of fact. As everything was in those times.