Ephesians 4:18 Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart:

2 Corinthians 4:3-5  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 which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.

For we preach not ourselves, but Christ Jesus the Lord; and ourselves your servants for Jesus' sake.