The heavens declare his righteousness, and all the people see his glory. The heavens declare his righteousness - They also, in this poetic description, become intelligent beings, and proclaim the majesty and the mercy of the Most High. Metaphorically, they may be said to declare his glory. Their magnitude, number, revolutions, order, influence, and harmony, proclaim the wondrous skill, matchless wisdom, and unlimited power of the Sovereign of the universe. See the notes on Psalms 19:1-14 (note).
And all the people see his glory - Whatsoever God has made proclaims his eternal power and Godhead; and who, from a contemplation of the work of his hands, can be ignorant of his being and providence?