Our text today forms a fitting conclusion to the book of Malachi. Remember that the prophets were covenant enforcers – not primarily foretellers of the future but forthtellers of the Word of God, of the law of God, the Law of Moses. They applied the unchanging Law of Moses to the changing circumstances of Israel’s history. So Malachi closes with an admonition to the people to remember God’s law. But it also closes with a promise; a promise that would enable God’s people to identify the day of the Lord before it arrived and so to recognize the Covenant Lord’s presence. It is this promise that we consider today: what did it mean and how did God fulfill it?