The Gospels say that many years before Jesus' birth, prophets had told a promise to the Jewish people that God would send them a Messiah, or holy teacher. Christians believe that the promised Messiah was Jesus. His mother was a young woman called Mary, who was engaged, but not yet married to a carpenter called Joseph. Joseph found out that Mary was pregnant and was upset. He was wondering what he should do, when an angel came from God to tell him that the baby was the Holy One. The angel said that he must "name the baby". This was a sign that he would take care of it like his own child.