Our Words Define Us
Why must one go specifically to a Kohen when he sees a potential Tzoraas? Why can he not go to any Talmid Chochom who has mastered the halachos of Nega'im?
Rav Itzele Volozhin says that the five kinds of tzoraas is a result of five fundamental sins. Tzoraas on one's body comes from overindulging in bodily desires. Tzoraas of Begadim is a result being obsessed with external beauty and constantly running after new clothing. Tzoraas of the head is caused by bad character, corrupt thinking, and haughtiness. Tzoraas in the beard is for sins of the mouth such as Lashon Hara and mockery. Lastly Tzoraas on the walls of one's home, where one is required to remove all his possessions, and ultimately destroy the house, is a punishment for chasing after wealth and possessions.
A person afflicted with tzoraas does not need someone to treat his nega, he needs someone who can heal his mind and soul. While any expert can distinguish a tamei nega from a tahor one, only a Kohen, the Ish HaChesed and the embodiment of Ahavas Yisroel, can get into the head of the Mitzora and help him climb out of his misery and make him whole again.
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