13:18-44 The priest is told what judgment to make, if there were any appearance of a leprosy in old sores; and such is the danger of those who having escaped the pollutions of the world are again entangled therein. Or, in a burn by accident, ver. 24. The burning of strife and contention often occasions the rising and breaking out of that corruption, which proves that men are unclean. Human life lies exposed to many grievances. With what troops of diseases are we beset on every side; and thy all entered by sin! If the constitution be healthy, and the body lively and easy, we are bound to glorify God with our bodies. Particular note was taken of the leprosy, if in the head. If the leprosy of sin has seized the head; if the judgment be corrupted, and wicked principles, which support wicked practices, are embraced, it is utter uncleanness, from which few are cleansed. Soundness in the faith keeps leprosy from the head.Then the priest shall look on him,.... Again, and which is no less than the fourth time; for notwithstanding his being pronounced clean, he was still subject to the inspection of the priest, if any alteration appeared:

and, behold, if the scall be spread in the skin; which was a certain sign of a leprosy:

the priest shall not seek for yellow hair; or be solicitous about that, whether there is any or not, for either one or the other of these signs were sufficient to determine the case:

he is unclean; and so to be pronounced.