And God saw that the light was good, and He separated the light from the darkness.
Light was good because it would dispel chaos, rarefy the elements, and prepare the earth to bring forth vegetation before the greater luminaries appeared. God divided light from darkness so thoroughly that they never occupy the same place or moment; by the earth's revolution, one succeeds the other as His constant ordinance.
AI summary
God's determining will, expressed in His command, was followed immediately by result. Though the sun may have been created before the earth, thick fogs and vapors covered the globe with gloom. By God's command, light became visible; the murky clouds dispersed and rarefied, and light diffused over the waters. The Hebrew name for day signifies warmth and heat, while night means a rolling up, as night wraps all things in shade.
AI summary
Commenting on Genesis 1:3-5
divided the light from darkness--refers to the alternation or succession of the one to the other, produced by the daily revolution of the earth round its axis.