וזאת הברכה
The Cohen is Totally Pure Like an Olah
יָשִׂימוּ קְטוֹרָה בְּאַפֶּךָ וְכָלִיל עַל מִזְבְּחֶךָ לג י
Moshe Rabeinu in his Bracha to Shevet Levi praises the Cohanim who bring Ketores (קְטוֹרָה), and the Korban Olah (כָּלִיל). Are these the only Korbanos that a Cohen is Makriv? Of course there are loads of Korbanos, like Asham, Chatas, Mincha, Shelamim, Ne’sachim, Hadlakas HaMenorah, etc. Why did Moshe single out the Olah? We can suggest that the Olah is totally pure for Shamayim, like a Cohen who is a pure person. He has Bitachon ONLY in Hashem (without Hishtadlus; i.e., going to work). And he is also pure, like it says: הָאֹמֵר לְאָבִיו וּלְאִמּוֹ לֹא רְאִיתִיו וְאֶת אֶחָיו לֹא הִכִּיר וְאֶת בָּנָיו לֹא יָדָע לג ט he didn’t recognize his relatives (to exempt them from punishment for worshiping the Eigel); exactly like Avraham Avinu who was ready to sacrifice his son for Hashem.
The Cohen is pure like an Olah, and this is why the Torah refers to the Korban Olah as כָּלִיל (a complete sacrifice) to emphasize his being totally ONLY for Hashem. And notice how the Cohen Gadol’s Me’il is: כְּלִיל תְּכֵלֶת totally blue wool. Blue symbolizes the blue Shamayim, and total-blue means being totally with Hashem without worry about people’s opinions and without Hishtadlus. Also, his Minchas Cohen is כָּלִיל (completely burned) on the Mizbeach, unlike other Menachos which are eaten.