Light is important in our day to day lives, it is essential to almost every form of life there is on this earth.
Jesus says in John 8:12, "I am the light of the world. He who follows Me shall not walk in darkness, but have the light of life."
When the Israelites were in the desert on their way to Caanan, God went before them as a pillar of light to guide them.
As Christians, we should live lives that show that light so that people notice that we are different in that we have hope, and light, in this dark world of sin.
God's word is a lamp unto our feet and a light to our path. (Psalm 119:105)
Our lives are to be lived out of thankfulness to God for sending his son to die and pay for our sins. We should keep the Law, and help others.
Now go out, and show the love of Jesus, and be joyful, because you who were once dead in sin, are now alive through Christ.