The Lord of Justice

The Lord of justice says he is about to come. He will send his messenger first. The prophet Elijah would discover in Malachi chapter 4 who Jesus identifies as John the Baptist, the Elijah who was to come. And then the Lord himself will come suddenly to his temple,. These two figures, the Lord and the messenger of the covenant are one and the same by how verse 2 refers to them in the singular God himself coming to his people.