That God will secure his chosen remnant to himself, how bad soever the times are (v. 7): Thou shalt preserve them from this generation for ever. This intimates that, as long as the world stands, there will be a generation of proud and wicked men in it, more or less, who will threaten by their wretched arts to ruin religion, by wearing out the saints of the Most High, Dan. 7:25. But let God alone to maintain his own interest and to preserve his own people. He will keep them from this generation, (1.) From being debauched by them and drawn away from God, from mingling with them and learning their works. In times of general apostasy the Lord knows those that are his, and they shall be enabled to keep their integrity. (2.) From being destroyed and rooted out by them. The church is built upon a rock, and so well fortified that the gates of hell shall not prevail against it. In the worst of times God has his remnant, and in every age will reserve to himself a holy seed and preserve that to his heavenly kingdom.
In singing this psalm, and praying it over, we must bewail the general corruption of manners, thank God that things are not worse than they are, but pray and hope that they will be better in God’s due time.
Henry, M. (1994). Matthew Henry’s commentary on the whole Bible: complete and unabridged in one volume (p. 760). Hendrickson.