Thou hast given him his heart's desire, and hast not withholden the request of his lips. Selah.
Heart's desire ... request ... lips. The silent desire of the heart and the spoken request of the lips stand here in contrast. The heart must prompt the prayer of the lips, if prayer is to be effectual. The promise in 2 Samuel 7:16; 2 Samuel 7:24-29, was doubtless the answer to David's prayer; which supposition accords with the expressions of triumphant gratitude which such marvelous grace elicited from him. His "desire" here is, plainly defined as one for 'salvation, strength' (Psalms 21:1), continuance of dominion (Psalms 21:4), 'glory, honour, and majesty,' in his posterity (Psalms 21:5). This psalm assumes the fact of his desire being granted, inasmuch as God bed promised it, (2 Samuel 7:1-29.) The blessing, at once temporal and spiritual, shall be finally realized in Messiah's kingdom.
Selah. The pause calls for devout meditation on the grace of God.