10 And it cometh to pass, on the morrow, that the spirit of sadness 'from' God prospereth over Saul, and he prophesieth in the midst of the house, and David is playing with his hand, as day by day, and the javelin 'is' in the hand of Saul, 11 and Saul casteth the javelin, and saith, 'I smite through David, even through the wall;' and David turneth round out of his presence twice.
Matthew Henry's Commentary on 1 Samuel 18:10-11
Commentary on 1 Samuel 18:6-11
(Read 1 Samuel 18:6-11)
David's troubles not only immediately follow his triumphs, but arise from them; such is the vanity of that which seems greatest in this world. It is a sign that the Spirit of God is departed from men, if, like Saul, they are peevish, envious, suspicious, and ill-natured. Compare David, with his harp in his hand, aiming to serve Saul, and Saul, with his javelin in his hand, aiming to slay David; and observe the sweetness and usefulness of God's persecuted people, and the barbarity of their persecutors. But David's safety must be ascribed to God's providence.