The Torah devotes an entire parsha to the preparation of the priestly vestments. Indeed, the Torah apportions more space to the “Bigdei Kehunah” than to the sacred vessels which were used in the Mishkan. Although the priestly vestments were not an inherent part of the actual service, the service could be performed only when the Kohen was wearing them. It seems apparent that the Bigdei Kehunah performed a sublime role.
The Chizkuni explains that ase hsdc, sacred garments, is the key phrase which defines the moral and spiritual striving represented by the priestly garb. The beauty manifested by these vestments was not of a mundane nature, but rather constituted a sanctified beauty. Clothing is a symbol of man’s higher nature. By distinguishing between man and animals, clothing gives man special dignity. The Kohanim were, therefore, required to dress consistently with their exalted position, reflective of man’s higher calling.
Horav M. Gifter, Shlita, suggests the following insight to be derived from the Bigdei Kehunah. Every virtue which man possesses is valued according to the individual’s ability to “clothe” himself in this characteristic. Man’s essence must mirror these qualities. The moral attributes, “yiraas shomayim,” and character refinement manifested by the Kohen should be inherent throughout his entire essence. It should be reflected externally, as well. If these traits are not externally apparent, the Kohen is not suitable to entreat Hashem on behalf of Am Yisrael. The service of atonement demands one who personifies perfection.
Horav Gifter extends this idea to include all members of Bnei Yisrael. Every Jew is obligated to affirm himself as a member of a “kingdom of priests and a holy nation”. This “appellation” is to be Am Yisrael’s distinctive feature. To fulfill this noble goal we must invest ourselves with the “clothing” of a holy nation: middos tovos (pure moral characteristics), Torah, and mitzvos. Analogous to the Kehunah, our worthiness of the mantle “holy nation,” is symbolized by our being “clothed” in our holy merit.