2 So enlist your brothers of the tribe of Levi to join you and assist you and your sons in your duties in the Tent of Testimony. 3 They will report to you as they go about their duties related to the Tent, but they must not have anything to do with the holy things of the Altar under penalty of death - both they and you will die! 4 They are to work with you in taking care of the Tent of Meeting, whatever work is involved in the Tent. Outsiders are not allowed to help you. 5 "Your job is to take care of the Sanctuary and the Altar so that there will be no more outbreaks of anger on the People of Israel. 6 I personally have picked your brothers, the Levites, from Israel as a whole. I'm giving them to you as a gift, a gift of God, to help with the work of the Tent of Meeting.
Matthew Henry's Commentary on Numbers 18:2-6
Commentary on Numbers 18:1-7
(Read Numbers 18:1-7)
The people complained of their difficulty and peril in drawing near to God. God here gives them to understand, that the priests should come near for them. Aaron would see reason not to be proud of his preferment, when he considered the great care and charge upon him. Be not high-minded, but fear. The greater the trust of work and power that is committed to us, the greater danger there is of betraying that trust. This is a good reason why we should neither envy others' honours, nor desire high places.