Because the King of the future age arrived in the first century, his kingdom also invaded this world in a way hidden to people but recognized by the evil one and his forces (see also Cullmann 1950:71). The demons here, believing they are free to torment people until the final day and expecting eternal torment in the day of judgment, recognize that their judge has just shown up, before the appointed time. God's ultimate intervention is yet to come, but this does not prevent us from depending on his power over the evil one in the present.