First reading
Thus says the Lord to Israel: “See, I am sending my messenger to prepare the way before me, and the Lord whom you seek will suddenly come to his temple. The messenger of the covenant in whom you delight — indeed, he is coming,” says the Lord of hosts.
But who can endure the day of his coming, and who can stand when he appears? For he is like a refiner’s fire and like fullers’ soap; he will sit as a refiner and purifier of silver, and he will purify the descendants of Levi and refine them like gold and silver, until they present offerings to the Lord in righteousness. Then the offering of Judah and Jerusalem will be pleasing to the Lord, as in the days of old and as in former years.
“Lo, I will send you the prophet Elijah before the great and terrible day of the Lord comes. He will turn the hearts of parents to their children and the hearts of children to their parents, so that I will not come and strike the land with a curse.”