The stanzas from from sixth to tenth describe the angels announcing the good news to the shepherds. In the sixteenth stanza, the author speaks in the first person to report the lullaby that Mary, the angels and shepherds sang for Baby Jesus. The lullaby - a typical folk melody very common among the people - was sung at times amid the stanzas.
In the final stanzas there is the moral teaching: people are invited to follow the example of the shepherds and to visit the manger with repentant heart for their sins, and be humble as the ox and donkey who recognize their Lord.
In the last stanza the contrast darkness/light appears: the sinner is pitch black, but if he repents, God's mercy will bring him back to the ancient splendor of the true sun. The last prayer is addressed to the Virgin Mary who, by accepting to be the Mother of God who became man, also accepted to be the mother of all sinners.