The theme of the hymn is the significance of the Christ-child. In the first stanza, he is depicted as a lowly, unremarkable human baby; some doubts exist as to whether someone so apparently ordinary could be so special. After the second stanza recounts the spectacular appearance of angels and wise men glorifying the Christ, the third stanza describes how the picture changed with this new understanding – no longer is he a stranger of dubious ability, but the undefiled Son of God who has come to save the world.