Daniel 10

Daniel is given a vision while mourning and fasting by the Tigris River. He sees a glorious man (likely a pre-incarnate appearance of Christ) who shines like lightning. An angel appears to strengthen Daniel and explains that he was delayed by the Prince of the Kingdom of Persia (a demonic ruler) for twenty-one days, until Michael, one of the chief princes (an archangel), came to help him. This revelation shows the hidden spiritual warfare occurring behind the scenes of earthly politics.