In the Bible the head, especially the hair on the head, signifies man’s glory (1 Cor. 11:7, 15), and a beard is related to dignity, to one’s self-assumed honor. The fact that there can be an infection on the head and on the beard indicates that it is easy for leprosy, the sin of rebellion, to be hidden within human glory and dignity.
An infection on the head signifies something wrong in the subjection to authority and in the thinking of the mind (cf. 2 Cor. 10:5; 2 Tim. 3:8). An infection on the beard signifies being self-dignified, hunting for exaltation from others (cf. Matt. 6:1-6; Luke 11:43; 14:7-11).
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