Let there be light,” and there was light.4 God saw that the light was good,
So God knew what light was and even had a name for it, which is not surprising since God is light, but He had no idea that light was good until He saw it.
"God is light – What does that mean?
Light is the nature and character of God. He is not a light or a kind of light; He is light itself. All light comes from Him. At the beginning of time, He created the light to dispel the darkness and chaos that was over all the earth (Genesis 1:1–5)"
How does the Trinity express Its collective will? By appointing a spokesperson. A the beginning that task fell upon God the father and a handful of prophets, but once His Son learned at the local synagogue the law that He, the Father, dictated to Moses, God the Father promptly tried to pass such task solely to His Son and after His Son's death to the top administrator/s of the Christian/s Church/s, but judging by the number of self-appointed spokepersons available at this forum without .much success. .
