4 In him was life, and that life was the light of all mankind. 5 The light shines in the darkness, and the darkness has not overcome it.
“‘The darkness has not overcome it’ means the darkness of evil never has and never will overcome or extinguish God’s light. Jesus Christ is the Creator of life, and his life brings light to mankind. In his light, we see ourselves as we really are (sinners in need of a Savior). When we follow Jesus, the true Light, we can avoid walking blindly and falling into sin. He lights the path ahead of us so we can see how to live. He removes the darkness of sin from our lives. In what ways have you allowed the light of Christ to shine into your life? Let Christ guide your life, and you’ll never need to stumble in darkness.” (Life Application Study Bible 1732)
Life Application Study Bible. Zondervan, 2011. p. 1732.