John Gills Exposition of the Bible Commentary - 1 Samuel 16:21
And David came to Saul, and stood before him ,.... As a servant, and ministered to him in the way, and for the purpose for which he was sent: and he loved him greatly ; being a comely person, and a well behaved youth, and especially as he was serviceable to him with his music, in driving away melancholy from him: and he became his armourbearer ; that is, he appointed him to this office, though we never read that he exercised it; nor did he go with Saul in this capacity to the battle... read more
Matthew Henry's Complete Commentary - 1 Samuel 16:14-23
We have here Saul falling and David rising. I. Here is Saul made a terror to himself (1 Sam. 16:14): The Spirit of the Lord departed from him. He having forsaken God and his duty, God, in a way of righteous judgment, withdrew from him those assistances of the good Spirit with which he was directed, animated, and encouraged in his government and wars. He lost all his good qualities. This was the effect of his rejecting God, and an evidence of his being rejected by him. Now God took his mercy... read more