Malachi 4:5-6 seems to be talking about the coming of Elijah in spirit, in two dispensations or time periods. The first is fulfilled by John the Baptist. Who fulfills the second?
“Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the LORD: and he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I come and [...]