Surely you were told when young that the light of the Moon is actually the light of the Sun reflected off the Moon. God made the Sun and made the Moon and did so through Jesus the Son of God. Genesis tells us the Moon was put as a ruler of the night and the Sun as ruler of the day. God had the opportunity here to teach us some theology and surely God, with His Son, made the most of it. The Moon is a lesser light to rule the night because the light needed at night needs to be lesser to be gentle on the living things that walk in this nightly light or sleep beneath it. The day is bright already so a Moon would barely be visible as a ruler and the Sun can fill the sky with awesome rays. When God spoke directly to Moses and Moses spoke to Israel the awesome glory was too much and the people grew weary of awe. They pleaded to Moses to ask God to stop speaking to them this way. So God told them He would send One who would come, Jesus. This Jesus is like the Moon with lesser light and the light is reflected greater light of God in the face of Jesus the Son of God. So the Moon and Sun are pictures of The Son of God and of God respectively to help us understand.
