Like the two disciples on the road to Emmaus, we learn something at the end (after Jesus resurrection) which sheds light on the meaning of all the details of the story going way back to the beginning. Being solid Trinitarians, we 
believe that the Holy Spirit is God, but is not the Father. The Son is God, but is not the Holy Spirit. The Father is God but is not the Son nor the Holy Spirit. But all three are God. When Jesus appeared on earth he made it clear that He was not the Father, but was the Eternal Son of God, or God, the Son. What the Father did as God, Jesus also did as God. Looking at the very beginning of Genesis and the creation account we know that the first words record coming from God was “Let there be light.” Immediately, there was light! (Genesis 1:3).
The light of creation was not the light of the sun, stars or the planets. It was the illumination that God sent directly into the world. The sun was not created until the fourth day. In Old Testament theology we cannot miss the fact that darkness represents confusion, uncertainty, evil, decay and death. Jesus connected Himself with the Father as God repeatedly in the New Testament. With respect to the first words spoken by God, “Let there be Light,” Jesus purposefully identifies with that when he says (John 8:12), “Jesus spoke to them, saying, ‘I am the light of the world. Whoever follows me will not walk in darkness, but will have the light of life.’”
Church history records the life of Gregory the Illuminator (240 A.D – 332 A.D). He is credited with leading the Arminian King to Christ which created the first National Church, even before Constantine’s conversion. He’s called the “Illuminator” because the light of Christ lite up the entire Kingdom. But Jesus is the great illuminator. Jesus is the radiant one! At the transfiguration His light outshone the sun. Jesus, as God the Son, is the source of all illumination and enlightenment. When we encounter Him all the confusion, uncertainty, evil, decay and death is washed out in His brilliance. That’s why we won’t need any sun in the eternal state. Jesus will be there and He’s the source of all we need to see everything clearly. Andrew Maclaren sees “Christ as the great illuminator, ready to shine on all drowsy, dark souls as soon as they stir and rouse themselves from drugged and fatal sleep.”