Vs 3.......them that are lost
Vs4....blinded the minds of them that believe not
Believers are not lost
Believers are not described as them that believe not then they wouldn't be believers.
That is what Paul is addressing here those who are lost and the reason they are lost.
He is not addressing the condition of Christians
He is making a factual statement just like he has made other factual statements:
Satan is the god of this world.
The whole world lies in hand of the wicked one.
Luke 4:5 And the devil, taking him up into an high mountain, shewed unto him all the kingdoms of the world in a moment of time.
6 And the devil said unto him, All this power will I give thee, and the glory of them: for that is delivered unto me; and to whomsoever I will I give it.
--All the kingdoms of the world are his to give.
He is the prince of the power of the air (Eph.2:2)
He is the spirit that now works in the children of disobedience (Eph.2:2)
Ephesians 6:12 For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
--He controls "spiritual wickedness in high places."
1 John 3:8 He
that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.
--All sin is of the devil. Everytime you sin it is of the devil. You are not perfect. You sin. It is of the devil, of his domain, his dominion of darkness. Sin is of the devil.