David had been going back and forth in the Palace. There's no way Saul could have denied the sweetness of his psalmistry, which had been giving him succour. Recommended by a servant, the shepherd boy skillfully served the purpose of easing the King's torment, and he found favour with Saul. However, the day he engaged the higher purpose of facing the giant, Saul realized he'd hitherto known David after the flesh, and started inquiring about him afresh. We'll be known at the level of the problem we solve.