We, in this dark and sinful world, know little of the heavenly world of light. But we know that there is above us a world of blessed angels. They are always praising God, therefore the psalmist shows his desire that God may be praised in the best manner; also we show that we have communion with spirits above, who are still praising him.
The heavens, with all contained in them, declare the glory of God. They call on us, that both by word and deed, we glorify with them the Creator and Redeemer of the universe.