What does the source of light refer to in a Christian context?

In John 1, Jesus is described as the Word, who was with God and was God, and in Him was life, which was the light of men. This light shines in the darkness, illuminating the hearts of those who believe. The source of light is not inherent in humanity but solely in Christ, who reveals truth and life to all who come to Him. Understanding Christ as the source of light encourages believers to rely on Him for spiritual vitality and wisdom, allowing His light to shine through them into a dark world.