At the outset of the Book of Genesis, we read:
Genesis 1:3-4: "Then God said, 'Let there be light'; and there was light. 4God saw that the light was good; and God separated the light from the darkness."
We know that God is light from 1 John 1:5. However, this does not appear to be the source of light mentioned on the first day of Creation. Soon thereafter we read:
Genesis 1:14-19: "Then God said, 'Let there be lights in the expanse of the heavens to separate the day from the night, and let them be for signs and for seasons and for days and years; 15and let them be for lights in the expanse of the heavens to give light on the earth'; and it was so. 16God made the two great lights, the greater light to govern the day, and the lesser light to govern the night; He made the stars also. 17God placed them in the expanse of the heavens to give light on the earth, 18and to govern the day and the night, and to separate the light from the darkness; and God saw that it was good. 19There was evening and there was morning, a fourth day."
All of the sources of natural light appear to have been created on the fourth day. (Note that I am not asking whether this "light" was literal or figurative since I take it literally.) How might we interpret this "light" and what would be its source?