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 Psalms 71:18.