Psalms 78:20

This psalm is historical; it is a narrative of the great mercies God had bestowed upon Israel, the great sins wherewith they had provoked him, and the many tokens of his displeasure they had been under for their sins. The psalmist began, in the foregoing psalm, to relate God's wonders of old, for his own encouragement in a difficult time; there he broke off abruptly, but here resumes the subject, for the edification of the church, and enlarges much upon it, showing not only how good God had been to them, which was an earnest of further finishing mercy, but how basely they had conducted themselves towards God, which justified him in correcting them as he did at this time, and forbade all complaints. Here is, I. The preface to this church history, commanding the attention of the present age to it and recommending it to the study of the generations to come (Psa 78:1-8). II. The history itself from Moses to David; it is put into a psalm or song that it might be the better remembered and transmitted to posterity, and that the singing of it might affect them with the things here related, more than they would be with a bare narrative of them. The general scope of this psalm we have (Psa 78:9-11) where notice is taken of the present rebukes they were under (Psa 78:9), the sin which brought them under those rebukes (Psa 78:10), and the mercies of God to them formerly, which aggravated that sin (Psa 78:11). As to the particulars, we are here told, 1. What wonderful works God had wrought for them in bringing them out of Egypt (Psa 78:12-16), providing for them in the wilderness (Psa 78:23-29), plaguing and ruining their enemies (Psa 78:43-53), and at length putting them in possession of the land of promise (Psa 78:54, Psa 78:55). 2. How ungrateful they were to God for his favours…