She [Mary] will bear a son, and you shall call his name Jesus, for he will save his people from their sins. All this took place to fulfill what the Lord had spoken by the prophet: “Behold, the virgin shall conceive and bear a son, and they shall call his name Immanuel” (which means, God with us).
Jesus came to forgive sins. This good news was announced by prophets of old. His name is Immanuel! God is with us in Jesus Christ.