“The Bible says light appeared on the 1st day of creation. However, the sun and stars weren’t created until the 4th day. How can there be light and days with no sun and stars?”
Apologists have different ways of answering this question. I once even considered what’s called the cosmic microwave background. However, through further scripture reading, I believe the Bible has answered this question thousands of years ago.
I believe the “light” in Genesis 1:3 is the Glory of God.
The reason I believe this is because of the parallels in the books Genesis and Revelation. In Genesis we have the creation of the world and the Garden of Eden, God’s temple on earth. We also have the fall of mankind and the curse on man and the rest of creation where God dwelt and communed with man. In the book of Revelation we see the reversal of the curse.
Therefore, the light in Genesis 1:3 is the same light that will exist in the New Earth in Revelation.
Revelation 21:23 The city does not need the sun or the moon to shine on it, for the glory of God gives it light, and the Lamb is its lamp.
There are other parallels mentioned in Genesis and Revelation. Here are some listed below:
Genesis 1:4 -separation of light and darkness
Revelation 21:25 -no night, only day.
Genesis 1:10 -separation of land and sea Revelation 21:1 -there is no more sea.
Genesis 2:10 -a river flows from the Garden of Eden
Revelation 22:1 -a river flows from God’s throne.
Genesis 2:9 -the Tree of Life in the midst of the garden
Revelation 22:2 -the Tree of Life throughout the city.
Genesis 2:12 -God and precious stones in the land
Revelation 21:19 speaks of gold and precious stones throughout.
Genesis 3:8 -God walks in the garden, among His creation
Revelation 21:3 -God will dwell amongst His people.
Genesis 3:17 -the ground is cursed because of man’s sin
Revelation 22:3 -there will be no more curse in the New Earth
Genesis 3:17-19 -sin results in pain and death being introduced to creation
Revelation 21:1-4 -there is no more pain or death in the New Heavens and New Earth.
Genesis 3:24 -Mankind is banished from the garden, and cherub guards the entrance Revelation 21:9 -angels actively invite into the city
In Genesis 3:15 we are given the first Gospel promise of the Redeemer who will crush the head of the serpent. Jesus is that one who is promised. While Adam broke the law given to him and brought death to the world. Jesus kept the whole law and defeated death. Adam disobeyed and ate of the tree God told him not to bringing death. Jesus obeyed and died on a tree bringing us life. As stated in 1 Corinthians 15:22, “For as in Adam all die, so also in Christ all will be made alive.”
Also read: Habakkuk 3:4, John 1:1-14, John 7:37-38, James 1:17, 1 John 1:5