Some, said Peter, say that you are Elijah. Now why would people think that Jesus was the long deceased prophet Elijah? Elijah was, of course, a highly revered personality in the religious life of the Hebrews. His defeat of the 450 prophets of Baal on the top of Mt. Carmel was a story that was known even by little children. It was a commonly held belief among the Hebrews that one day Elijah would return and that would mark the end of the world. In the very last passage in the Old Testament, in the Book of Malachi, we find these words: "Behold I will send you Elijah the prophet before that great and dreadful day of the Lord comes."
Most of you have read Charles Schultz's comic strip Peanuts. One day we see that the television is on but there is no one in the room listening to it. The announcer is talking about a golf tournament that is in process. He says: Smith has to make this putt to win the championship. There will be no tomorrow." And just as he says, "There will be no tomorrow," in walks Lucy. She immediately goes into a panic and starts running around and yelling to the other children: "The world is coming to an end. They just announced it on television." Her panic quickly spreads as we see all the peanuts kids as they go wildly screaming about. Finally in the last square we see all of the children huddled on top of Snoopy's doghouse waiting for the end of the world. And Charlie Brown finally speaks up with a puzzled voice: I thought that Elijah was supposed to come back first."
Well, Charlie Brown knew his Bible. Elijah was suppose to come back before the end time. When the disciples told Jesus that some people thought he was Elijah, they were expressing a common thought among the people that the end was very near.