Malachi 3:1-4, 23-24
Chapter 3
1
Now I am sending my messenger ahead of me to clear the way; then, suddenly, the Lord, for whom you long, will enter the sanctuary. The envoy of the covenant, which you greatly desire, is already coming, says the Lord of hosts.
2
Who can endure the day of his coming and remain standing when he appears? For he will be like fire in the furnace and like the fuller’s lye.
3
He will be as a refiner and a purifier. He will purify the sons of Levi and refine them, like gold and silver. Then the Lord will have priests who will present the offerings as they should be.
4
And the Lord will accept the offerings of Judah and Jerusalem with pleasure, as in past days.
23
I am going to send you the prophet Elijah before the day of the Lord comes, for it will be a great and terrible day.
24
He will reconcile parents with their children, and children with their parents, so that I may not have to curse this land when I come.

Commentaries
Judgment of Purification.
The people weary the Lord with empty words. The post-exilic community overwhelms him with mechanical worship, lacking in loyalty and genuine commitment. Jesus also denounces this same hypocrisy (Mt 6:7). However, in this context, the chapter of hope opens: the promise of renewal and purification for the people. Who will be the messenger that the Lord sends? The Hebrew structure of Malachi 3:1 indicates that it is the Lord himself who will come to his Temple. It is important to distinguish him from “Elijah,” the precursor who will prepare the way for his arrival (3:23).
Tithes and Harvests.
God stays faithful; he doesn’t change, even when his people are unfaithful (3:6). When offering a new opportunity, he doesn’t lower his demands on those in the covenant. The tithe is what we give to God: not just material goods, but also our inner attitude. Like the poor widow in the Gospel (cf. Mk 12:41-44), the Lord invites us to give ourselves fully so his grace can work completely in us. What do we give to God? Do we offer him what’s left over, or what truly commits us? (cf. Mt 22:21).
God’s Justice.
The passage indicates that Malachi’s audience not only complains against the Lord but also blames Him for what seems like an injustice: in reality, the wicked often thrive while the righteous struggle. This view goes against God’s consistent message through His prophets, who condemn the arrogance and fleeting success of the wicked (cf. Is 5:20; 10:1-2). The same idea appears in what’s called “prosperity theology,” promoted in some evangelical and Protestant circles, which views divine blessing as material success. However, this perspective distorts the biblical message, which emphasizes faithfulness, justice, and total dedication beyond just seeking worldly rewards.
The Return of Elijah.
Jesus confirms that this prophecy is fulfilled through the person and ministry of John the Baptist, who serves as an agent of purification and reconciliation, preparing the way for the Messiah’s arrival. This mission is set within the prophetic declaration of the “Day of the Lord,” a phrase filled with judgment, hope, and renewal, found in various prophetic books (cf. Am 5:18; Zep 1:14; Jl 2:1).
It is important that the last of the prophets, who in many editions of the Bible comes before the New Testament, ends precisely with an opening toward that “Day of the Lord” (4:5), thus serving as a bridge between prophetic expectation and its fulfillment in the New Testament.