Who can understand the Scriptures?

2 Corinthians 4:3-4 EMTV

(3)  But even if our gospel is hidden, it is hidden among those who are perishing, (4)  among whom the god of this age has blinded the minds of the unbelievers, so that the illumination of the gospel of the glory of Christ, who is the image of God, should not shine on them.