I don’t recall now if I noticed the connections between Isaac and Saul in 1 Samuel. Isaac abuses his divinely favored son Jacob; Saul abuses his son-in-law David. Isaac preferred Esau, the eldest, to the second son; Saul prefers Jonathan to David. One of the key discontinuities is Jonathan’s behavior. He is the anti-Esau, the older son who willingly cedes his place of priority to his younger “brother” David.