It's kind of interesting the way that Samuel was afraid that Saul would kill him. This was either irrational fear on Samuel's part or else Samuel knew that Saul's heart would be in a bad place as the result of this.

And, later on when Samuel did choose Saul, the Spirit of God left Saul, indeed putting him in a bad place. But David's music, a pure and heartfelt worship of God, helped to calm him.

(As a sidenote, did you ever notice that, when you remove the "me" from "Samuel", you are left with "Saul"? I haven't a clue as to any meaning for that.)