4 Then at last you will know it was I who sent you this warning so that my covenant with the Levites can continue," says the Lord of Heaven's Armies. 5 "The purpose of my covenant with the Levites was to bring life and peace, and that is what I gave them. This required reverence from them, and they greatly revered me and stood in awe of my name. 6 They passed on to the people the truth of the instructions they received from me. They did not lie or cheat; they walked with me, living good and righteous lives, and they turned many from lives of sin.
Matthew Henry's Commentary on Malachi 2:4-6
Commentary on Malachi 2:1-9
(Read Malachi 2:1-9)
What is here said of the covenant of priesthood, is true of the covenant of grace made with all believers, as spiritual priests. It is a covenant of life and peace; it assures all believers of all happiness, both in this world and in that to come. It is an honour to God's servants to be employed as his messengers. The priest's lips should not keep knowledge from his people, but keep it for them. The people are all concerned to know the will of the Lord. We must not only consult the written word, but desire instruction and advice from God's messengers, in the affairs of our souls. Ministers must exert themselves to the utmost for the conversion of sinners; and even among those called Israelites, there are many to be turned from iniquity. Those ministers, and those only, are likely to turn men from sin, who preach sound doctrine, and live holy lives according to the Scripture. Many departed from this way; thus they misled the people. Such as walk with God in peace and righteousness, and turn others from sin, honour God; he will honour them, while those who despise him shall be lightly esteemed.