So what is light? In the beginning God made the heavens and the earth. With a word. Let there be light. And there was light. In the beginning was the word and the word was God and the word was with God……. In Him was life and the life was the light of men. And the light shines in the darkness and the darkness did not comprehend it. Because light is truth and darkness is lies or untruth. Not knowing and not realizing … darkness. And the light overcomes the darkness

(from Genesis and the apostle John)