2 Corinthians 4:3-6

3 Even if our gospel is veiled, it is veiled in those who perish;  4 in whom the god of this world has blinded the minds of the unbelieving, that the light of the gospel of the glory of Christ, who is the image of God, should not dawn on them.  5 For we don't preach ourselves, but Christ Jesus as Lord, and ourselves as your servants for Jesus' sake;  6 seeing it is God who said, "Light will shine out of darkness," who has shone in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.