The heavens declare the glory of God, and the firmament showeth, is announcing or extolling, His handiwork. The entire universe reflects the majesty of God's creative power, and therefore all nature is here personified as a preacher of His omnipotence and providence.
Related Commentaries of Psalms 19:1
Psalms 19:1
1 The heavens declare the glory of God; and the firmament sheweth his handywork.