The lowly prayer which we have been tracing rises ere its close to a vow of renewed praise. It is very beautiful to note how the poet nature, as well as the consciousness of a Divine function, unite in the resolve that crowns the psalm. To David no tribute that he could bring to God seemed so little unworthy--none to himself so joyous--as the music of his harp, and the melody of his songs; nor was any part of his kingly office so lofty in his estimation as his calling to proclaim in glowing words the name of the Lord, that men might learn to love. His earliest song in exile had closed with a like vow. It had been well fulfilled for many a year; but these last doleful months had silenced all his praise. Now, as hope begins to shine upon him once more, the frost which had stilled the stream of his devotion is melting, and as he remembers his glad songs of old, and this miserable dumbness, his final prayer is, "O Lord, open Thou my lips, and my mouth shall show forth Thy praise." The same consciousness of sin, which we have found in a previous verse discerning the true significance of ceremonial purification, leads also to the recognition of the insufficiency of outward sacrifices--a thought which is not, as some modern critics would fain make it, the product of the latest age of Judaism, but appears occasionally through the whole of the history, and indicates not the date, but the spiritual elevation of its utterer. David sets it on the very summit of his psalm, to sparkle there like some stone of price. The rich jewel which he has brought up from the abyss of degradation is that truth which has shone out from its setting here over three millenniums: "The sacrifices of God are a broken spirit; a broken and a contrite heart, O God, Thou wilt not despise."