In vv. 4, 5, the psalmist interjects a prayer for himself, the abruptness of which strongly reminds us of similar jets of personal supplication in Nehemiah. The determination to make the "I" of the Psalter the nation perversely insists on that personification here, in spite of the clear distinction thrice drawn in ver. 5 between the psalmist and his people. The "salvation" in which he desires to share is the deliverance from exile for which he prays in the closing verse of the psalm. There is something very pathetic in this momentary thought of self. It breathes wistful yearning, absolute confidence in the unrealised deliverance, lowly humility which bases its claim with God on that of the nation. Such a prayer stands in the closest relation to the theme of the psalm, which draws out the dark record of national sin, in order to lead to that national repentance which, as all the history shows, is the necessary condition of "the prosperity of Thy chosen ones." Precisely because the hope of restoration is strong, the delineation of sin is unsparing. With ver. 6 the theme of the psalm is given forth, in language which recalls Solomon's and Daniel's similar confessions (1 Kings viii. 47; Dan. ix. 5). The accumulation of synonyms for sin witnesses at once to the gravity and manifoldness of the offences, and to the earnestness and comprehensiveness of the acknowledgment. The remarkable expression "We have sinned _with_ our fathers" is not to be weakened to mean merely that the present generation had sinned like their ancestors, but gives expression to the profound sense of national solidarity, which speaks in many other places of Scripture, and rests on very deep facts in the life of nations and their individual members. The enumeration of ancestral sin begins with the murmurings of the faint-hearted fugitives by the Red Sea. In Psalm cv. the wonders in Egypt were dilated on and the events at the Red Sea unmentioned. Here the signs in Egypt are barely referred to and treated as past at the point where the psalm begins, while the incidents by the Red Sea fill a large space in the song. Clearly, the two psalms supplement each other. The reason given for Israel's rebellion in Psalm cvi. is its forgetfulness of God's mighty deeds (ver. 7_a_, _b_), while in Psalm cv. the remembrance of these is urgently enjoined. Thus, again, the connection of thought in the pair of psalms is evident. Every man has experiences enough of God's goodness stored away in the chambers of his memory to cure him of distrust, if he would only look at them. But they lie unnoticed, and so fear has sway over him. No small part of the discipline needed for vigorous hope lies in vigorous exercise of remembrance. The drying up of the Red Sea is here poetically represented, with omission of Moses' outstretched rod and the strong east wind, as the immediate consequence of God's omnipotent rebuke. Ver. 9_b_ is from Isa. lxiii.