A Demon in Church

It sounds like a scene out of a movie. While Jesus is preaching in a synagogue a demon-possessed man suddenly addresses him. Talk about a sermon interruption. The demon launches a host of questions at Jesus. But Jesus doesn't answer him. He just tells him to "shut up and leave". And the demon obeys. Isn't it interesting how easily evil spirits obey Jesus, yet we don't? What do they know about Jesus that we don't get?