Redeems those He died for from the Prison of Unbelief !4
So the bringing out the prisoners from the prison [of unbelief] is deliverance out of unbelief, So faith or believing in Christ is the evidence that Christ's Redemptive Death worked, was effective, in redeeming from iniquity to include unbelief. We know that Christ's redemptive death worked for those He died for when they believe the Gospel of their Salvation, it means that His Death successfully redeemed them out of the Prison, and that their Spiritual eyes had been opened as per Acts 26:18
18 To open their eyes, and to turn them from darkness to light, and from the power of Satan unto God, that they may receive forgiveness of sins, and inheritance among them which are sanctified by faith that is in me.
See when a sinner is in Unbelief they are evidencing being under the Power of satan !
Thats why, all the while we are in a lost state, the god of this world, satan has blinded our minds so that we believe not 2 Cor 4:3-4
3 But if our gospel be hid, it is hid to them that are lost:
4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
Thats why its antichrist to say that any of those Christ died for can yet die in their sins in unbelief as Per Jn 8:24
24 I said therefore unto you, that ye shall die in your sins: for if ye believe not that I am he, ye shall die in your sins.
That is to say that ordained effects of Christ's Redemptive Death in the Purpose of God has been defeated by the devil and unbelief which contradicts Isa 42:7, because any and all in unbelief are spiritually in a prison Rom 11:32 ! Now ask yourself as I will ask myself, Did the Christ I believe in, that died for His People, deliver them from the Prison of Unbelief/disobedience ? If not, he is not the Christ of God !