Allegory of Saul-David. Most surreal?

We become so used to thinking of the Apostle Paul that we may forget how he was named Saul prior to his conversion. He was of the Tribe of Benjamin, same as was the Saul of the OT. That OT Saul, the first king of Israel, had a notable conflict with David, and when you read the story carefully it's telling in covert or disguised terms about how the old man of the flesh dies (Saul), and the new hidden man of the heart emerges (David). It's probably the most surreal of all the allegories, but it answers some questions like why king Saul didn't seem to recognize David, or why David wanted his enemy Saul to keep on living.

2Sam 3:10 - "To translate the kingdom from the house of Saul, and to set up the throne of David over Israel and over Judah, from Dan even to Beersheba".

1Sam16:23 "And it came to pass, when the evil spirit from God was upon Saul, that David took an harp, and played with his hand: so Saul was refreshed, and was well, and the evil spirit departed from him".

1Sam17:58 And Saul said to him, Whose son art thou, thou young man? And David answered, I am the son of thy servant Jesse the Bethlehemite.
In chapter 16 we read about David ministering to Saul by playing the harp. So maybe he played from a distance, or behind a screen of some kind? Because in the following chapter Saul doesn't recognize David, and it raises the question 'How could you not know somebody you've already met? The New Testament tells us about the "old man of the flesh", and the "new hidden man of the heart"!

Had the first name of Paul been other than Saul, we might never have connected the two accounts and appreciated the intricate skill of the Great Author in burying surreal accounts simultaneously with building the 66 books of the Bible.

If the New Testament didn’t declare how we would “become new creatures in Christ”, there would be no reason to ‘find’, or discover this veiled account of how ‘king Saul’ was put down and replaced by a man after God’s heart: King David. Two who were illustrating one!