Living under the sword of Damocles is a popular expression that means you are under a constant and imminent danger that threatens the location, activity or life of people and especially the most powerful, expression that is set in the mid-19th century, although history or legend of Damocles is known since ancient times by Latino writers and then by Lope de Vega and other writers of the golden age. Damocles seems like a courtly flatterer envious of Dionisio I, tyrant of Syracuse in Sicily from the 4th century b. C. To make you experience the honeys and the power hieles, it proposed sitting on the throne one day. To look up on the throne saw that a sword hung over it, subject to the ceiling with the mane of a horse, which lost all interest in continue of tyrant.