Malachi 2:2 - Matthew Poole's English Annotations on the Holy Bible

If ye will not hear: this if to the prophet was dubious, but to God, who sent the prophet, it was not doubtful; but it was for monition to the priests and Jews, and implied a condition of mercy if they would yet hear, but an inevitable curse if they did not hear. If ye will not lay it to heart; if you do not consider what you hear, to do the good, to forbear the evil. To give glory unto my name, by a due and holy manner of sacrificing and offering incense; in neglect of which you have greatly sinned, and dishonoured me, and polluted my name and altar. I will even send a curse: it is a comprehensive threat, many miseries in one word; it is a blast on their good hoped for, and it is poison in the good possessed, and when it is, as here, sent of God, it will surely do both, it will be a blast on hopes, it will be poison in what is possessed and should be enjoyed. Upon you; all, both priests and people, but especially on the priests. Your blessings; all the good, sweet, necessary supports of life, and comforts of yourselves and yours. I have cursed them already; you have so long polluted my name, and would not reform, that I have already sent out the curse, and it is in part upon you, though you are not sensible of it, nor will feel it, and this is forerunner of greater curses yet coming, unless you repent. Because ye do not lay it to heart: the sin was great in that you polluted my name, but it becomes much greater when you add impenitence to it, and harden yourselves, and will not lay it to heart; therefore the curse is gone out with commission from God to seize you.