2 Your brothers also, the tribe of Levi, the tribe of your father, bring near with you, that they may be joined to you, and minister to you: but you and your sons with you shall be before the tent of the testimony. 3 They shall keep your commands, and the duty of all the Tent: only they shall not come near to the vessels of the sanctuary and to the altar, that they not die, neither they, nor you. 4 They shall be joined to you, and keep the responsibility of the Tent of Meeting, for all the service of the Tent: and a stranger shall not come near to you. 5 “You shall perform the duty of the sanctuary, and the duty of the altar; that there be wrath no more on the children of Israel. 6 I, behold, I have taken your brothers the Levites from among the children of Israel: to you they are a gift, given to Yahweh, to do the service 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.