The sun to rule by day - Genesis 1:16. Margin, as in Hebrew, for the ruling of the day. That is, to control, as it were, the day; to determine its length - its beginning - its ending - to make it what it is.
For his mercy - By all the blessings of day as distinguished from night and darkness - by all that the sun in his daily course does to diffuse life, joy, peace, comfort, happiness on the earth - by all that are warmed by its beams, cheered by its light, guided in labor, guarded from dangers - do we derive an argument for the mercy of God; by all this there is laid a foundation for his praise.

The sun to rule by day,.... Which is the greater light, Genesis 1:16;
for his mercy endureth for ever: this great light, so beneficial to the earth and the inhabitants of it, which was made near six thousand years ago, still continues, and will to the end of time; enlightening the world, warming the air and earth, imparting its light and heat to all creatures on it, and influencing the earth to bring forth a variety of things for the use and delight of mankind, called "the precious things brought forth by the sun", Deuteronomy 33:14; an emblem of a more beneficial light, in which the rich grace and mercy of God appear, and for which we have reason to give thanks; even the sun of righteousness, the Messiah, the light of the world, the author of the light of nature, grace, and glory; and who will continue as long as the sun, and when that shall be no more, Malachi 4:2.