When I consider thy heavens, the work of thy fingers, the moon and the stars, which thou hast ordained;
Thy heavens ... the moon and the stars. The sun is probably included in "thy heavens" - namely, as they appear by day, wherein the sun rules supreme. "The moon and the stars" in the second dense describe the splendour of the night heavens. Compare Psalms 19:1-2; Psalms 19:4-6 where day, with its sun, and night are similar contrasted. David's original occupation as a shepherd, watching his flocks by night as well as day, would naturally suggest glorious thoughts of God's greatness exhibited in the visible heavens. Affliction it was that elicited his poetical powers. So blessed are the results of sanctified sorrow.
The work of thy fingers - human language used of God, in condescension to man's conceptions. What a contrast to the most ingenious works of man's "fingers"!