"At that time Michael shall rise up, the great prince, who standeth for the children of thy people: and a time shall come as never was from the time that nations began even until that time. And at that time shall thy people be saved, every one that shall be found written in the book."
St. Michael is the patron saint of policemen, swordsmen, security forces, warriors, grocers (because he weighs souls, good and bad deeds on judgment day), radiologists and radiographers. He is also invoked against evil.