Having completed the instructions regarding the procedures for the sacrifices, the Torah describes how Aaron and his four sons were installed into the priesthood. Moses assembled the entire Jewish people at the entrance to the Tabernacle so they could witness these rituals.
The Purpose of the Priest
וַיֹּאמֶר מֹשֶׁה אֶל הָעֵדָה זֶה הַדָּבָר אֲשֶׁר צִוָּה ה' לַעֲשׂוֹת: (ויקרא ח:ה)
Moses said to the community: “This procedure is what G‑d commanded [me] to do.” Leviticus 8:5

Aaron and his son were installed into the priesthood through two types of offerings: specific sacrifices that Moses offered up on their behalf every day for a full week when the Tabernacle was first erected, and a grain-offering that every priest was required to offer up on the first day of his service (and which the high priest was required to offer up twice every day). The purpose of these sacrifices was to awaken within Aaron and his sons the qualities that would enable them to act as the Jewish people’s representatives before G‑d, whether by securing atonement for their misdeeds or by raising them to higher levels of Divine consciousness.

Every one of us has the inner power to not only overcome spiritual darkness but to transform it into light. But this inner power is not always readily available to us, for various reasons. We must therefore seek out individuals who are steeped in the Torah and further along the path of spiritual refinement than we are, so we can benefit from their inspiration and guidance. At the same time, we must also develop our inner “priest,” both in order to transform our own inner darkness into light, as well as to help others do the same for themselves.1