The fetters of the acrostic structure forbid freedom and progress of thought, and almost compel repetition. It is fitted for meditative reiteration of favourite emotions or familiar axioms, and results in a loosely twined wreath rather than in a column with base, shaft, and capital. A slight trace of consecution of parts may be noticed in the division of the verses (excluding ver. 22) into three sevens, of which the first is prayer, the second meditation on the Divine character and the blessings secured by covenant to them who fear Him, and the third is bent round, wreath-like, to meet the first, and is again prayer. Such alternation of petition and contemplation is like the heart's beat of the religious life, now expanding in desire, now closing in possession. The psalm has no marks of occasion or period. It deals with the permanent elements in a devout man's relation to God. The first prayer-section embraces the three standing needs: protection, guidance, and forgiveness. With these are intertwined their pleas according to the logic of faith--the suppliant's uplifted desires and God's eternal tenderness and manifested mercy. The order of mention of the needs proceeds from without inwards, for protection from enemies is superficial as compared with illumination as to duty, and deeper than even that, as well as prior in order of time (and therefore last in order of enumeration), is pardon. Similarly the pleas go deeper as they succeed each other; for the psalmist's trust and waiting is superficial as compared with the plea breathed in the name of "the God of my salvation"; and that general designation leads to the gaze upon the ancient and changeless mercies, which constitute the measure and pattern of God's working (_according to_, ver. 7), and upon the self-originated motive, which is the deepest and strongest of all arguments with Him (_for Thy goodness' sake_, ver. 7).