I think that the job of poetry, its political job, is to refresh the idea of justice, which is going dead in us all the time.
It wasn't a new idea. During the war against the French we had this kind of broadcast for the French soldiers.
That men should live honestly, quietly, and comfortably together, it is needful that they should live under a sense of God's will, and in awe of the divine power, hoping to please God, and fearing to offend Him, by their behaviour respectively.