Matthew 5:14-16 (NKJV)
When you enter a dark room you naturally turn on the light to see where you are going. Normally rooms have a lighting system with light bulbs in some fixtures that were designed to help people find their way around the room. That lighting system was not put there just for decoration; it is there for a reason. The light bulb that lights up the room is not the electric company itself but the bulb is displaying a light that is created by the power that is coming from the electric company. In a similar way we need to be a kind of "Christian light bulb" in a world that is in darkness without Jesus.
In Matthew 5:14-16 Jesus told His disciples that they were the light of the world. The Bible also tells us in 1 John 1:5 that "God is light and in Him is no darkness at all". From these two scriptures we can see that God is light and we are His lights in the world. We need to shine our light and do what we can to help direct people to Jesus and to display godly characteristics that are a reflection of our heavenly Father. We need to show people how through a relationship with Jesus Christ we can live successfully in this world and overcome the difficulties that come our way in life.
Jesus walked the earth 2000 years ago. He is now in heaven, seated at the right hand of God the Father. That is His place to be, our place is here on the earth, in this world, being representatives of Jesus. The point is that if Jesus is going to do anything or help anyone on the earth today in any way it is going to be through us, we are here to do His work and to shine as a light for Him. As followers of Jesus Christ we are representatives of God, our life should reflect His light. Once we receive Jesus as our Lord and Savior we become that light of the world, let's shine bright for Jesus!