There's a world around us that has never heard the gospel. Without salvation they are hopelessly lost for eternity. Satan, the god of this world, strives to keep them that way.
2 Corinthians 4:3,4 But if our gospel be hid, it is hid to them that are lost: In whom the god of this world hath blinded the minds of them whch believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
The Light of Christ is powerful and special because it's the image of God. The Light of Christ is the Anointed One, The Messiah, The Savior and Redeemer, offering salvation to all who believe in Him.
Are we committed to allow the light of Christ to shine through us or will we keep it hidden?