 It opens with Hannah's own gratitude for a local reversal, and closes with God's defeat of his enemies – a cosmic reversal.Through the theme of reversal, the Song of Hannah functions as an introduction to the whole book.Keil and Delitzsch argue that Hannah's experience of reversal was a pledge of how God "would also lift up and glorify his whole nation, which was at that time so deeply bowed down and oppressed by its foes."