Yesterday I finished a year and three months of teaching through 1 Samuel with a lesson on the book as a whole. I summarized the message of 1-2 Samuel with this single statement:
The kingship of Israel is established by God through the prophet Samuel by an everlasting covenant with the house of David.
Should you care to listen to the 30-minute Sunday School lesson, you can download it here. I wouldn’t recommend listening to it near bedtime.