Passage
When the spirit from God was on Saul, David took the harp, and played with his hand; so Saul was refreshed, and was well, and the evil spirit departed from him.
When the spirit from God was on Saul, David took the harp, and played with his hand; so Saul was refreshed, and was well, and the evil spirit departed from him.
1 Samuel 16:21 David came to Saul, and stood before him. He loved him greatly; and he became his armor bearer.
1 Samuel 16:22 Saul sent to Jesse, saying, “Please let David stand before me; for he has found favor in my sight.”
1 Samuel 16:23 When the spirit from God was on Saul, David took the harp, and played with his hand; so Saul was refreshed, and was well, and the evil spirit departed from him.
The verse centers on "Spirit", "saul", "david", "took", "harp", "played", and "hand". It is saying that the verse draws attention to "Spirit" and "saul", so its meaning should be read from those terms before moving to application.
The prior verse says "Saul sent to Jesse saying Please let...", giving immediate footing for "Spirit" and "saul". In 1 Samuel context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "Spirit" and "saul" with trust shaped by these words, not by a vague optimism outside the passage.