Resurrection (from the Latin noun resurrectio -onis, from the verb rego, "to make straight, rule" + preposition sub, "under", altered to subrigo and contracted to surgo, surrexi, surrectum + preposition re-, "again", thus literally "a straightening from under again") is the concept of a living being coming back to life after death. It is a religious concept, where it is used in two distinct respects: a belief in the resurrection of individual souls that is current and ongoing (Christian idealism, realized eschatology), or else a belief in a singular resurrection of the dead at the end of the world. The resurrection of the dead is a standard eschatological belief in the Abrahamic religions. In a number of ancient religions, a dying-and-rising god is a deity which dies and resurrects. The death and resurrection of Jesus is an example of resurrection, and this instance is the central focus of Christianity.