Malachi 2:1 - Albert Barnes' Notes on the Bible

And now this is My commandment unto you - , not a commandment, which He gave them, but a commandment in regard to them. As God said of old, upon obedience , “I will command My blessing unto you,” so now He would command what should reach them, but a curse. “He returns from the people to the priests, as the fountain of the evil, whose carelessness about things sacred he had rebuked before. Let the priests of the new law hear this rebuke of God, and conceive it dictated to them by the Holy Spirit to hear, from whom God rightly requires greater holiness, and so will punish them more grievously, if careless or scandalous in their office.” All Christians are, in some sense 1 Peter 2:9, “a royal, holy priesthood,” over and above the special “Christian priesthood;” as the Jews, over and above the special priesthood of Aaron, were a Exodus 19:6, “kingdom of priests.” What follows then belongs, in their degree, to them and their duties.