2 Corinthians 4:3-6
New King James Version (NKJV)
3 But even if our gospel is veiled, it is veiled to those who are perishing, 4 whose minds the god of this age has blinded, who do not believe, lest the light of the gospel of the glory of Christ, who is the image of God, should shine on them. 5 For we do not preach ourselves, but Christ Jesus the Lord, and ourselves your bondservants for Jesus’ sake. 6 For it is the God who commanded light to 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.
1 Corinthians 2:14
New King James Version (NKJV)
14 But the natural man does not receive the things of the Spirit of God, for they are foolishness to him; nor can he know them, because they are spiritually discerned.