Psalms 78:6

A testimony in Jocob - This may signify the various ordinances, rites, and ceremonies prescribed by the law; and the word law may mean the moral law, or system of religious instruction, teaching them their duty to God, to their neighbor, and to themselves. These were commanded to the fathers - the patriarchs and primitive Hebrews, that they should make them known to their children, who should make them known to the generation that was to come, whose children should also be instructed that they might declare them to their children; to the end that their hope might be in God, that they might not forget his works, and might keep his commandments: that they might not be as their fathers, but have their heart right and their spirit steadfast with God, Psalm 78:6-8. Five generations appear to be mentioned above: 1. Fathers; 2. Their children; 3. The generation to come; 4. And their children; 5. And their children. They were never to lose sight of their history throughout all their generations. Some think the testimony here may mean the tabernacle.

That the generation to come might know them ... - That people in future times might enjoy the benefit of them as their fathers had done, and that they should then send them forward to those who were to succeed them.

Who should arise and declare them to their children - Who, as they appeared on the stage of life, should receive the trust, and send it onward to future ages. Thus the world makes progress; thus one age starts where the previous one left off; thus it enters on its own career with the advantage of all the toils, the sacrifices, the happy thoughts, the inventions of all past times. It is designed that the world shall thus grow wiser and better as it advances; and that future generations shall be enriched with all that was worth preserving in the experience of the past. See the notes at Psalm 71:18.