What is an angel?

An angel is an ethereal being found in the beliefs of many religions, whose duties are to assist and serve God. According to the three major monotheistic religions, angels typically act as messengers. More specifically, in Christianity, the word angel refers to the most superior of the nine traditionally divided into the angelic beings. The branch of theology that deals with the angels is called angelología.

From the religious point of view, the Angels are usually viewed as creatures of great purity in many cases designed to protect humans. In this regard, Christianity speaks of guardian angel or custodian, to be who God has brought each person to protegerla1. In contrast, there is also the figure of the fallen angel, who has been expelled from heaven for disobeying or rebelling against God. The best known of them in the Christian tradition, is Lucifer.