The demon in this Gospel says to Jesus, "I know who you are." How did the demon know who Jesus was? This lessons begins with an explanation of the Blessed Trinity, one God in three persons. This eternal exchange of Love was extended first to the angels and then to humans. God desires the angels and humans to share in the divine life - the eternal exchange of love. Lucifer (Satan) and the fallen angels (demons) choose to not serve and not love God. Although they knew Him, they could not love and serve him. Why does Satan and his demons not want us to share in the divine live. How does Satan and his demons try to keep us from sharing in the divine life? This lesson covers possession and obsession.