When someone discovers that he or she has "tzara'at", the Torah says they must bring the problem to "Aaron the Kohen, or to one of his sons, the kohanim." But why not simply say that they can consult the kohanim, which includes Aaron, his sons, and any of their descendants? Why does the Torah need to mention Aaron and his sons? Rabbi Dunner offers a beautiful suggestion from Rav Zalman Sorotzkin (1881-1966), one of the great rabbinic leaders of the twentieth century.