Why is understanding the light and life in Christ important for Christians?

Understanding the light and life found in Christ is crucial for Christians as it reveals the nature of our salvation and our relationship with God. John 1:4 states that in Him was life, and the life was the light of men, indicating that true understanding and illumination come from knowing Christ. This knowledge helps believers to see their sinfulness apart from Christ and the grace given to them in Him. It reinforces that righteousness is not achieved through our efforts but is a gift from God, allowing Christians to live in the freedom and security of their identity as children of God, completely dependent on His grace.