God set [the lights and stars] in the vault of the sky to give light on the earth, to govern the day and the night, and to separate light from darkness. And God saw that it was good. And there was evening, and there was morning—the fourth day. And God said, “Let the water teem with living creatures, and let birds fly above the earth across the vault of the sky.” (Genesis 1:17-20)
God could have created everything in a single day. But instead, he paced himself, spreading the initial work of creation over six “days.”
Take today’s passage as an example. On the fourth day, God created the sun, moon, and stars. Could he have also created “living creatures” that same day? Of course! But he chose not to. After finishing the work of creating the heavenly lights, God called it a day. He rested. And then of course, on the seventh day, he did no work at all, establishing for the first time the idea of Sabbath (see Genesis 2:1-3).
God didn’t need to rest on the Sabbath. And he certainly had no ...