v1-3: Saul's hostility towards David was more open. He asked both Jonathan and his attendants to kill David. Jonathan remained loyal to David, even disobeying his father.
v4-5: Jonathan mediated for David before Saul, with gracious and true words.
v6-7: Saul's anger abated, but only for a while. Saul continued to pursue David, in spite of his own promises to stop. David was even brought back into Saul's palace.
v8: David was again sent to fight the Philistines, and again he won a decisive victory.
v9-10: Saul made another attempt on David's life. David was courageous in remaining in Saul's presence. But this was the final time; David left Saul, and never returned to the palace.
v11-14: David went home, but he could not remain there safely. Michal helped his to escape, putting a household idol in the bed. Many Jews still had such things; presumably Michal herself worshipped idols.
v15-16: Saul's pursuit of David was merciless, seeking to bring him to the palace on his sick bed, and have him killed.
v17: Now, Saul and Michal were in disagreement, since Saul wanted to kill her husband. David is "my enemy", indicating Saul's hatred.
v18: David fled to Samuel. David never again fought in Saul's army, and remained a fugitive until Saul's death.
v19-24: David's whereabouts were reported to Saul. But God intervened directly to save David. The Spirit of God came upon Saul's servants, and then Saul himself, and they prophesied. Saul had previously prophesied, see 18.10. Under the power of God, they proclaimed the Name of the Lord, as in Ex 34.6-7, rather than predicting future events. The incidents serve to bring Saul into humility, even humiliation, that he might repent; but his heart remained unchanged.
A single incident of the Holy Spirit inspiring a person is no indication of real faith and deep commitment to God. For example, Balaam spoke words under the power of God, yet remained an idolater.