Musar zu Zechariah 3:1

And all of this was alluded to in the verse concerning Yehoshua ben Yehotzadak, the high-priest, viz. (Zechariah 3:1): "And He showed me Yehoshua the high-priest standing before the angel of the L-rd. And the Satan was standing on his right, to accuse him… (4) …Remove the dungy vestments from him [Yehoshua]." The "dungy vestments" connote the uncleanliness of transgressions, which are as repulsive as dung. And "Remove … from him" indicates that he was clothed in them against his will. And this is what Scripture tells us tersely in (Vayikra 11:43): "Do not make yourselves unclean in them, lest you become unclean through them."