Here is God's purpose and promise to all of us, Matthew 5:14 - "Ye are the light of the world. A city that is set on an hill cannot be hid." If we will let Jesus do the making in our lives, God will definitely be lifted up on us and make us shine.

It is important for all to know that  for God, Any other life style aside being being a light or an extension of Him automatically make such person not useful to God. This is where we need to ask God to help us, so that we can desire after His will and that He can help us to come to that place where by following Jesus, we also are the light of God. Romans 5:10  For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life.

2 peter 1:3 - According as his divine power hath given unto us all things that pertain unto life and godliness, through the knowledge of him that hath called us to glory and virtue [KJV]
 
God has given to us, all that we need. Whatsoever we need in the life to please God has been given to us. God is ministering to us that He has made His move and He needs to make our move. Again, 2 Corinthians 5:17 says that anyone who is now in Christ is now a born again; this means that as new creations, we must know that It is no longer us that leave but Christ in us. This means that under this new Kingdom we find ourselves, we now must live by every provision made available by Jesus.  We must live our lives in Christ but We must decide, with intention that this is now the live we have settle with and let God take charge of every part of our life.
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2 Corinthians 3: 15-18, - Even during the ministry of Moses, God Showed His back to Moses, and as a result, Moses face shined. How much more the ministry of the Holy spirit.

2 Corinthians 4: 3-6
3 But if our gospel be hid, it is hid to them that are lost:
4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
5 For we preach not ourselves, but Christ Jesus the Lord; and ourselves your servants for Jesus' sake.
6 For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.

Unless our hearts are blinded by the things of this world, the word of God is intended to shine through us by default. When this is not shining as intended, we should run to God and cry out for help for He is the author of our lives, He can lead us to that place where His work can shine from inside of us through us to the world.