And the Lord spake unto Moses. This passage contains two heads: first, That the Levites should be set apart for the ministry of the sanctuary and altar; and, secondly, That they should obey the chief priests of the family of Aaron, and do nothing except by their authority and command. But it has been already said, and we shall hereafter see again, that the tribe of Levi in general was divinely chosen to perform the sacred offices; so that the people might know that no one was worthy of so honorable a charge; but that it depended on the gratuitous calling of God, whose attribute it is to create all things out of nothing. In this way, not only was the temerity of those repressed who might be foolishly ambitious of the honor, but the whole Church was taught that, in order to worship God aright, there was need of extraneous aid. For, if the Levites had not stood between, the Law prohibited the rest of the people from having access to God, since it brought in the whole human race guilty of pollution. But, in order that they might be more certainly directed to the One Mediator, the high priesthood was exalted, and one priest was chosen to preside over all the rest: on this account God would have the Levites subject to the successors of Aaron. At the same time, He had regard to order, for a multitude, which is not governed by chiefs, will always be disorderly. Yet, it is unquestionable that the supreme power of Christ was represented in the person of Aaron; and hence the folly of the Papists is refuted, who transfer, or rather wrest, this example to the state of the Christian Church, so as to set the bishops over the presbyters, and thus to fabricate the primacy of the Roman See. But if the true meaning of this figure be sought, it will be more appropriate to reason that, whatever ministers and pastors of the Church are now appointed, they are placed as it were under the hand of Christ, in order that they may usurp no dominion, but behave themselves modestly, as having to render an account to Him who is the Prince of pastors. (1-Peter 5:4.) Hence we conclude that the Papacy is only founded in wicked sacrilege; for Christ is unjustly deprived of His own, if any one else is feigned to be Aaron's successor. Meanwhile, the political distinction of ranks is not to be repudiated, for natural reason itself dictates this in order to take away confusion; but that which shall have this object in view, will be so arranged that it may neither obscure Christ's glory nor minister to ambition or tyranny, nor prevent all ministers from cultivating mutual fraternity with each other, with equal rights and liberties. Hence, too, was taken that declaration of the Apostle, that it is not lawful for any man to take this honor upon himself, but that they are the legitimate ministers of the Church who are "called" to be so. (Hebrews 5:4)

And the Lord spake unto Moses,.... After he had given him the order for the numbering the children of Israel, and for the manner of their encampment and journeying:
saying; as follows.

Bring the tribe of Levi near--The Hebrew word "bring near" is a sacrificial term, denoting the presentation of an offering to God; and the use of the word, therefore, in connection with the Levites, signifies that they were devoted as an offering to the sanctuary, no longer to be employed in any common offices. They were subordinate to the priests, who alone enjoyed the privilege of entering the holy place; but they were employed in discharging many of the humbler duties which belonged to the sanctuary, as well as in various offices of great utility and importance to the religion and morals of the people.

The Levites are placed before Aaron the priest, to be his servants.