John sums up all he had learned from Jesus in the message: " ... that God is LIGHT, and in Him is no darkness AT ALL." Light in the Scriptures is the emblem of perfect purity, truth, knowledge, prosperity, and joy. In Him, there is NO darkness at all, not even a pin-prick. Where there is pure light, there is pure love. On the other hand, darkness is the absence of light. When people stray from believing in God and having love for others, they step back into the darkness and act in ways that are inconsistent with His character. Darkness represents what is sinful and evil. God is untainted by any evil or sin. Because "God is light" He alone can guide people out of the darkness of sin and unbelief.