David went out wherever Saul sent him, [and] behaved himself wisely: and Saul set him over the men of war, and it was good in the sight of all the people, and also in the sight of Saul's servants.
Of course, he was not aware of the fact that God had chosen David to be the king, and that God had anointed David to be king over Israel. So it is interesting that immediately he began to suspicion the fact that the kingdom was in jeopardy. "What does he want more than this, the kingdom?"