1:14-19 In the fourth day's work, the creation of the sun, moon, and stars is accounted for. All these are the works of God. The stars are spoken of as they appear to our eyes, without telling their number, nature, place, size, or motions; for the Scriptures were written, not to gratify curiosity, or make us astronomers, but to lead us to God, and make us saints. The lights of heaven are made to serve him; they do it faithfully, and shine in their season without fail. We are set as lights in this world to serve God; but do we in like manner answer the end of our creation? We do not: our light does not shine before God, as his lights shine before us. We burn our Master's candles, but do not mind our Master's work.And to rule over the day, and over the night,.... The one, namely the sun, or greater light, to rule over the day, and the moon and stars, the lesser lights, to rule over the night: this is repeated from Genesis 1:16 to show the certainty of it, and that the proper uses of these lights might be observed, and that a just value might be put upon them, but not carried beyond due bounds:

and to divide the light from the darkness; as the day from the night, which is done by the sun, Genesis 1:14 and to dissipate and scatter the darkness of the night, and give some degree of light, though in a more feeble manner, which is done by the moon and stars:

and God saw that it was good; or foresaw it would be, that there should be such lights in the heaven, which would be exceeding beneficial to the inhabitants of the earth, as they find by good experience it is, and therefore have great reason to be thankful, and to adore the wisdom and goodness of God; see Psalm 136:1. See Gill on Genesis 1:4.