The song "O Come, O Come Emmanuel" is a classic Christmas hymn that dates back to the Middle Ages. It is based on an ancient hymn called the "O Antiphons," which were sung during the week leading up to Christmas. The lyrics speak of Israel's captivity and longing for the coming of the Son of God, who will ransom them and bring them salvation. The song also calls upon God to come and teach us His ways, to guide us and show us the path of knowledge. The chorus repeatedly declares "Rejoice, Rejoice, Emmanuel shall come to thee, O Israel," reminding us of the hope and joy that the birth of Jesus brings. Hannah Kerr's version of the song adds a modern twist with a chorus that encourages us to take heart and rejoice in the birth of the Savior of the world, who is coming to help us and whose name is holy. Overall, the song reminds us of the miracle of Christmas and the hope and joy that it brings, both in the past and in the present day.