Mark 9:11-13

Mark 9:11-13. And they asked him, saying, Why say the scribes that Elias must first come? And he answered and told them, Elias verily cometh first, and restoreth all things; and how it is written of the Son of man, that he must suffer many things, and be set at nought. But I say unto you, That Elias is indeed come, and they have done unto him whatsoever they listed, as it is written of him.

John the Baptist had come, in the spirit and power of Elijah, and had reconstituted matters, and prepared the people for the advent of the Saviour, whose herald he was.