How does light relate to spiritual life in the Bible?

John 1:4 states, 'That life was the light of men,' indicating that spiritual life is intrinsically linked with enlightenment and understanding. The light symbolizes the truth that illuminates our minds and hearts, helping us comprehend the things of God (Ephesians 1:18). Just as light dispels darkness, spiritual life revives and transforms our dead hearts, enabling us to perceive spiritual realities clearly. This light not only shines in the darkness but also overcomes it (John 1:5), assuring believers that darkness cannot extinguish the light of Christ.