And that ye may put difference between holy and unholy, and between unclean and clean;

And that ye may teach the children of Israel all the statutes which the LORD hath spoken unto them by the hand of Moses.

They shall teach Jacob thy judgments, and Israel thy law: they shall put incense before thee, and whole burnt sacrifice upon thine altar.

And they shall teach my people the difference between the holy and profane, and cause them to discern between the unclean and the clean.

And in controversy they shall stand in judgment; and they shall judge it according to my judgments: and they shall keep my laws and my statutes in all mine assemblies; and they shall hallow my sabbaths.

For the priest's lips should keep knowledge, and they should seek the law at his mouth: for he is the messenger of the LORD of hosts.

Holding fast the faithful word as he hath been taught, that he may be able by sound doctrine both to exhort and to convince the gainsayers.