“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” (2 Corinthians 4:3-4). Unbelievers are blinded. Their minds are dull. No real understanding. No discernment. No perception. Clueless.
But the glorious light of the gospel of Christ shines upon those who believe! This is not man made. It is Spiritual. Supernatural. There is no boasting but in Christ!