In a world of darkness, Jesus is the light (John 8:12). The reason so many are lost is they are groping in the dark, unaware of the light that will guide them to truth and life. Christ commissions every person who proclaims Him to be Lord to share the gospel with everyone we meet (Matthew 28:18-20).
We are to take the light of the world and shine it in the darkest corners of our planet. How will the lost ever hear of Jesus if we won’t tell them about Him (Romans 10:13-15)? The spread of the gospel is not a job we can leave for someone else to do. We are that someone else. It is our responsibility to point those in the dark to the way of the light.