Malachi 3:1-4
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.

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).