And the Lord spake unto Moses. Moses here treats of the accidents whereby pollution is contracted, although a man may be by nature pure and sound. If any labored under natural defects, Moses prohibited them from exercising the sacerdotal office; now, if any extrinsic pollution may have affected a priest, he commands him to abstain from his duties until he shall have been purified. He had already commanded that any unclean person should be separated from the people lest their contagion should infect others; it may therefore seem superfluous to prescribe to the priests what had been universally enjoined. But since men placed in any position of honor are apt to abuse God's favor as a pretext for sin, lest the sacerdotal dignity might be used as a covering for the indulgence or excuse of scandals, it was necessary to enact an express law, that the priests should not plead their privilege to eat in their uncleanness of the sacrifices which none but the clean might offer. And that their sacrilege might be the more detestable, he denounces death against any who should intrude their pollutions into the sacrifices; for it was necessary to arouse by the fear of punishment, and as it were to drive by violence to their duty those who would not have been otherwise restrained by any religious feeling from making God's service contemptible. He then enumerates the particular kinds of pollution of which we have before spoken. Whence it appears, that the priests were brought into discipline by this law, lest they should think themselves more free than the rest of the people, thus might indulge themselves in security; and this is afterwards more clearly expressed where God admonishes them to "keep his ordinance," (ver. 9:) i.e., diligently to observe whatever He commanded; and the greater dignity He had honored them with, that the greater should be their study to persevere in the exercises of piety; for he shews them that so far from their sacerdotal rights conducing to the alleviation of their sin, they were more strongly bound by them to keep the Law.

And the Lord spake unto Moses,.... Immediately after he had spoken concerning blemishes in priests, and in a continued discourse signifying, that though priests that had blemishes might eat of the holy things, yet neither they, nor even such who had not any, if they were under legal impurity, might eat of them:
saying; as follows.

In this chapter we have divers laws concerning the priests and sacrifices, all for preserving the honour of the sanctuary. Let us recollect with gratitude that our great High Priest cannot be hindered by any thing from the discharge of his office. Let us also remember, that the Lord requires us to reverence his name, his truths, his ordinances, and commandments. Let us beware of hypocrisy, and examine ourselves concerning our sinful defilements, seeking to be purified from them in the blood of Christ, and by his sanctifying Spirit. Whoever attempts to expiate his own sin, or draws near in the pride of self-righteousness, puts as great an affront on Christ, as he who comes to the Lord's table from the gratification of sinful lusts. Nor can the minister who loves the souls of the people, suffer them to continue in this dangerous delusion. He must call upon them, not only to repent of their sins, and forsake them; but to put their whole trust in the atonement of Christ, by faith in his name, for pardon and acceptance with God; thus only will the Lord make them holy, as his own people.

Reverence for Things Sanctified. - The law on this matter was, (1) that no priest who had become unclean was to touch or eat them (Leviticus 22:2-9), and (2) that no one was to eat them who was not a member of a priestly family (Leviticus 22:10-16).