The Torah, “Numbers” 8:9 – 8:10: … and you shall gather the entire congregation of the children of Israel. You shall bring the Levites before the Lord, and the children of Israel shall lay their hands upon the Levites.
“Hands” stand for the receiving properties. If the people join the Levites, the latter become able to receive for the sake of further transferring what they receive to the people. However, if people do not join the Levites, they don’t acquire a receiving vessel because in this case the Levites have no capacity into which they can receive, meaning they have no Kli for the Light to enter. Therefore the Levites are concerned about having the people of Israel approach them. In this case, they fulfill their mission.
It is said that Cohens (Cohanim – priests) and Levites do not have an allotment (a share) of their own. Their share is solely in the spiritual world. You can say that Bina is their home. Therefore, Cohens and Levites stand for the human properties that are of a purely bestowing nature.
From KabTV’s “Secrets of the Eternal Book” 2/4/15