There is a natural connection between acrostic structure and didactic tone, as is shown in several instances, and especially in this psalm. The structure is on the whole regular, each second verse beginning with the required letter, but here and there the period is curtailed or elongated by one member. Such irregularities do not seem to mark stages in the thought or breaks in the sequence, but are simply reliefs to the monotony of the rhythm, like the shiftings of the place of the pause in blank verse, the management of which makes the difference between a master and a bungler. The psalm grapples with the problem which tried the faith of the Old Testament saints--namely, the apparent absence of correlation of conduct with condition--and solves it by the strong assertion of the brevity of godless prosperity and the certainty that well-doing will lean to well-being. The principle is true absolutely in the long run, but there is no reference in the psalm to the future life. Visible material prosperity is its promise for the righteous, and the opposite its threatening for the godless. No doubt retribution is not wholly postponed till another life, but it does not fall so surely and visibly as this psalm would lead us to expect. The relative imperfection of the Old Testament revelation is reflected in the Psalms, faith's answer to Heaven's word. The clear light of New Testament revelation of the future is wanting, nor could the truest view of the meaning and blessedness of sorrow be adequately and proportionately held before Christ had taught it by His own history and by His words. The Cross was needed before the mystery of righteous suffering could be fully elucidated, and the psalmist's solution is but provisional. His faith that infinite love ruled and that righteousness was always gain, and sin loss, is grandly and eternally true. Nor is it to be forgotten that he lived and sang in an order of things in which the Divine government had promised material blessings as the result of spiritual faithfulness, and that, with whatever anomalies, modest prosperity did, on the whole, attend the true Israelite. The Scripture books which wrestle most profoundly with the standing puzzle of prosperous evil and afflicted goodness are late books, not merely because religious reflectiveness was slowly evolved, but because decaying faith had laid Israel open to many wounds, and the condition of things which accompanied the decline of the ancient order abounded with instances of triumphant wickedness.