There are no regular strophes, but a tendency to run into paragraphs of four verses, with occasional irregularities.
Vv. 1-4 declare the singer's didactic purpose. He deeply feels the solidarity of the nation through all generations--how fathers and children are knit by mystic ties, and by possession of an eternal treasure, the mighty deeds of God, of which they are bound to pass on the record from age to age. The history of ancient days is "a parable" and a "riddle" or "dark saying," as containing examples of great principles, and lessons which need reflection to discern and draw out. From that point of view, the psalmist will sum up the past. He is not a chronicler, but a religious teacher. His purpose is edification, rebuke, encouragement, the deepening of godly fear and obedience. In a word, he means to give the spirit of the nation's history.
Vv. 5-8 base this purpose on God's declared will that the knowledge of His deeds for Israel might be handed down from fathers to sons. The obligations of parents for the religious training of their children, the true bond of family unity, the ancient order of things when oral tradition was the principal means of preserving national history, the peculiarity of this nation's annals, as celebrating no heroes and recording only the deeds of God by men, the contrast between the changing bearers of the story and the undying deeds which they had to tell, are all expressed in these verses, so pathetic in their gaze upon the linked series of short-lived men, so stern in their final declaration that Divine commandment and mercy had been in vain, and that, instead of a tradition of goodness, there had been a transmission of stubbornness and departure from God, repeating itself with tragic uniformity. The devout poet, who knows what God meant family life to be and to do, sadly recognises the grim contrast presented by its reality. But yet he will make one more attempt to break the flow of evil from father to son. Perhaps his contemporaries will listen and shake themselves clear of this entail of disobedience.
The reference to Ephraim in vv. 9-11 is not to be taken as alluding to any cowardly retreat from actual battle. Ver. 9 seems to be a purely figurative way of expressing what is put without a metaphor in the two following verses. Ephraim's revolt from God's covenant was like the conduct of soldiers, well armed and refusing to charge the foe. The better their weapons, the greater the cowardice and ignominy of the recreants. So the faithlessness of Ephraim was made darker in criminality by its knowledge of God and experience of His mercy. These should have knit the tribe to Him. A general truth of wide application is implied--that the measure of capacity is the measure of obligation. Guilt increases with endowment, if the latter is misused. A poor soldier, with no weapon but a sling or a stick, might sooner be excused for flight than a fully armed archer. The mention of Ephraim as prominent in faithlessness may be an allusion to the separation of the kingdoms. That allusion has been denied on the ground that it is the wilderness history which is here before the psalmist's mind. But the historical retrospect does not begin till ver. 12, and this introduction may well deal with an event later than those detailed in the following verses. Whether the revolt of the Ten Tribes is here in view or not, the psalmist sees that the wayward and powerful tribe of Ephraim had been a centre of religious disaffection, and there is no reason why his view should not be believed, or should be supposed to be due to mere prejudiced hostility.
The historical details begin with ver. 12, but, as has been noticed above, the psalmist seems to change his intention of first narrating the wonders in Egypt, and passes on to dilate on the wilderness history. "The field of Zoan" is the territory of the famous Egyptian city of Tzan, and seems equivalent to the Land of Goshen. The wonders enumerated are the familiar ones of the passage of the Red Sea, the guidance by the pillar of cloud and fire, and the miraculous supply of water from the rock. In vv. 15, 16, the poet brings together the two instances of such supply, which were separated from each other by the forty years of wandering, the first having occurred at Horeb in the first year, and the second at Kadesh in the last year. The two words "rocks," in ver. 15, and "cliff," in ver. 16, are taken from the two narratives of these miracles, in Exod. xvii. and Numb. xx.