Musar su Proverbi 23:21

ובגדיכם לא תפרומו . The reason that the priests must not rend their garments (10,6) is connected with their function as a sign of honor and dignity. We can apply the treatment to be accorded to these garments to the treatment we must accord to our bodies. The body is the garment of the soul. How much more insulting would it be to the soul if our body, its showpiece, would be torn, i.e. would bear signs of the sins we have committed!

שלא לקרוע המעיל. Rabbi Menachem Ha-Bavli comments on this too. He sees allegorical meaning in the words לפיו סביב in the same verse. The rim, פיו, of the robe which must not be torn is a symbol for the High Priest's mouth. In view of the High Priest's function of restoring harmony between G–d and His people, he, more than anyone else, must be sure not to say anything that could impair the unity or innocence of the people. Every individual who claims to be a servant of the Lord must in this regard conduct himself on the same level as did the High Priest.