"And even if our gospel is veiled, it is veiled to those who are perishing, in whose case the god of this world has blinded the minds of the unbelieving so that they might not see the light of the gospel of the glory of Christ, who is the image of God." "But a natural man does not accept the things of the Spirit of God, for they are foolishness to him; and he cannot understand them, because they are spiritually appraised."
Ironic imagery that Paul uses to describe the spiritual condition of the lost, since he himself was struck blind as he approached Damascus. His sightless eyes mirrored the blindness of his soul. He had no idea who it was who had knocked him so forcefully to the dust.
Yet, before that momentous day, had anyone asked, he would have been greatly insulted at the very questioning of his spiritual understanding. Of course he was not spiritually blind! The very idea!! His Judaic credentials were impeccible, his academic accomplishments impressive. So it is with spiritual pride. "Every man's ways seems right in his own eyes."
Thus, the one who says, "I see just fine" has the least awareness that he is spiritually sightless, while the awakened one, the redeemed believer, needs daily ask that the Lord who knows the hearts of all would continually reveal his own heart to him (for indwelling sin blinds each of us to areas which need confession, repentance, and forsaking). Praise to the gracious Father for His blessed Spirit's revealing ministry!