The Torah, “Numbers” 1:48 – 1:51: The Lord spoke to Moses saying: Only the tribe of Levi you shall not number, and you shall not reckon their sum among the children of Israel. But you shall appoint the Levites over the Tabernacle of the Testimony, over all its vessels and over all that belong to it; they shall carry the Tabernacle and they shall minister to it, and they shall encamp around the Tabernacle. When the Tabernacle is set to travel, the Levites shall dismantle it; and when the Tabernacle camps, the Levites shall erect it; any outsider [non Levite] who approaches shall be put to death.
“Levites” is the attribute of Bina in a person that is the true vessel for receiving the Upper Light, the Shechina (the revelation of the Creator). This is the reason that they can approach the Tabernacle. All our other attributes are forbidden to do so since the closer one approaches the Tabernacle, the greater the Light that is revealed and a person will not be able to reveal it for the sake of love and bestowal, just as it happened to the sons of Aaron, Nadav and Avihu, who thought that they were already corrected.
Question: What do the priests (Cohens) and the Levites engage in?
Answer: The Cohens are the embodiment of the spiritual government and they engage mainly in ideological work while the Levites teach the people. They are the teachers and guides who work with the masses. The role of the Cohens is to serve the Levites and the nation for the sake of the Creator. The role of the Levites is to serve the Cohens and the nation for the sake of the Creator. The people should only think about how to ascend to that level. This is the only thing they need to worry about.
The priests are GAR of Bina and the Levites are ZAT of Bina and so the Levites are the part that bestow unto the vessels of receiving (unto the people).
From KabTV’s “Secrets of the Eternal Book” 12/24/14