Exactly how does Satan blind people’s minds? Does he possess some mystical spiritual power that he pours like a potion into people’s heads to dull their understanding? Does a demon dig its talons into their brains, effectively short-circuiting their rational thinking processes? No, Satan blinds people’s minds by supplying them with lies to believe.
Obviously, if people really believed the truth that Jesus is the Son of God who died for their sins, if they really believed that they will one day have to stand before Him to give an account of their lives, then they would repent and become His followers. But they don’t believe those things. They do, however, believe something. They may believe that there is no God, or that there is no life after death. They may believe in reincarnation, or that God would never send anyone to hell. They may think that their religious works will get them into heaven. But whatever they believe, if it is not the gospel, it can be summed up in one word: lies. They don’t believe the truth, and thus Satan keeps them blinded through lies. If, however, they humble themselves and believe the truth, Satan will not be able to blind them any longer.