In this episode of How to Read the Bible, Nate Claiborne and Benjamin Kandt discuss how to look for repetitions in Scripture. In the Sermon on the Mount, they point out the line by line repetitions in the Beatitudes, the law by law repetitions that follow, and then Ben explains how a repeated phrase unlocked Matthew 6 for him. 

As a bonus, Nate explains how the key verse from Ben's analysis also explains the point of the Harry Potter franchise.