Brimstone often is used in the same sentence as hell-fire. Together, they are supposed to denote the wrath of God. Brimstone is a component of the fires that burn in hell and is a combination of sand, salt, sea water and ashes. The ashes are from the souls of individuals who have converted to Satanism. Thus, when someone who has worshipped the devil dies and enters hell, their soul is immediately destroyed in the fires of hell and becomes ashes.
These individuals do not have to await the final judgment because they are judged immediately upon death. They also have no hope of ever returning to the earth realm because Satan, their king, will be trapped in hell during Jesus' millennial reign. Some of these individuals have been brought back to the earth in recent years and they have become demonic spirits embodied in humans. They will be incapable of doing so during Jesus' millennial reign.
All of the saints of God who remain faithful to the end will be able to see the kingdom of God established. Some will be members of the kingdom of God on the earth and others will be in the earth but outside of the kingdom. Those who are outside of the kingdom will have natural lifespans, but the healings and resurrections from the dead that occurred during Jesus' ministry will become commonplace. Unfortunately, those who are currently alive, were told of God's gift of eternal life, and refused the indwelling Holy Spirit of God will be unable to receive the Holy Spirit subsequent to Jesus' return.
In the days of Moses, the Israelites refused to enter the Promised Land as God had instructed them after the exodus from Egypt. They were full of fear, ingratitude and arrogance. Two members of their entire group, Caleb and Joshua were faithful, trusted God, and lived to enter the Promised Land forty years later. The remainder of the group died in the desert in the succeeding forty years. Only the individuals who were born after that act of disobedience were able to enter the Promised Land with them. The rebellion had contaminated the entire group.
Similarly, today there are individuals who have been told of the indwelling Holy Spirit and who are now well aware that they do not have the Holy Spirit, yet refuse to pray and to submit. They will suffer the same fate as the Israelites--not only will they be banned from the millennial kingdom of God, but also they will forfeit the chance to enter the final Kingdom of God at the end of time.
If you are a pastor and this sounds confusing, it may be time to re-read the entire New Testament from cover to cover as you would read a book. If you are a member of a congregation in which the pastor refuses to acknowledge the Holy Spirit of God or to give the Holy Spirit to the congregation, you may need to either find a way to convince him, or seek the Holy Spirit's input on what you should do. For some, the solution will be to find a new church, and for others, the solution will be to find a new pastor.
If you are not certain whether you need a new church or a new pastor, ask the Holy Spirit to reveal truth. If you can see in the spirit realm and your pastor has a crown, but is refusing to assist the congregation in gaining their crowns, he or she may be struggling with selfishness, fear or complacency. You have an obligation to challenge them, and to sharpen them as iron sharpens iron.
If, however, you look at the top of the pastor's head in the spirit realm and see two six-inch horns, it is a sign that he has in him the spirit of Satan. The spirit of Satan is ten times worse than the worst demonic spirit. It contaminates the person to such a degree than they can never again receive the indwelling Holy Spirit. They also cannot die spiritually, so they will experience torment in hell for all eternity. They know that they have in them the spirit of Satan because Satan does not give his spirit to anyone who does not pledge to him their eternal allegiance. They also know that they will live forever, but Satan neglected to mention the part about the torment.
When everything has been said and done, at the end of a thousand years, Jesus will hand the kingdom over to El Shaddai, the Lord God Almighty, who will reign on the earth for all eternity.