The soul of man is not up for grabs. Satan is not in a battle to try to win your soul for himself. The destiny of the soul of man lies only with God, and Satan will never have dominion over any of them.
God and only God has the power to destroy a man's soul.
Matt 10:28 Do not be afraid of those who kill the body but cannot kill the soul. Rather, be afraid of the One who can destroy both soul and body in hell.
Even though demons have the ability to possess a man's body, even they must submit to the power of God and they recognize the authority of His Son Jesus Christ.
Mark 5:6 When he saw Jesus from a distance, he ran and fell on his knees in front of him. 7 He shouted at the top of his voice, "What do you want with me, Jesus, Son of the Most High God? Swear to God that you won't torture me!" 8 For Jesus had said to him, "Come out of this man, you evil spirit!"
There is only one way to free a person from an evil spirit and that is by the authority of Jesus Christ. No crosses, holy water or garlic will save you from such things.
Acts 16:18 Finally Paul became so troubled that he turned around and said to the spirit, "In the name of Jesus Christ I command you to come out of her!" At that moment the spirit left her.
If a person is freed from an unclean spirit and that space is not replaced with the Spirit of God, then it will not do any good, and it could even cause more harm.
Luke 11:24 "When an evil spirit comes out of a man, it goes through arid places seeking rest and does not find it. Then it says, 'I will return to the house I left.' 25 When it arrives, it finds the house swept clean and put in order. 26 Then it goes and takes seven other spirits more wicked than itself, and they go in and live there. And the final condition of that man is worse than the first."
The person who is driving out the demon must have the power and knowledge of Christ or else he too is in danger of possession.
Acts 19:13 Some Jews who went around driving out evil spirits tried to invoke the name of the Lord Jesus over those who were demon-possessed. They would say, "In the name of Jesus, whom Paul preaches, I command you to come out." 14 Seven sons of Sceva, a Jewish chief priest, were doing this. 15[One day] the evil spirit answered them, "Jesus I know, and I know about Paul, but who are you?" 16 Then the man who had the evil spirit jumped on them and overpowered them all. He gave them such a beating that they ran out of the house naked and bleeding.
The only way to be totally free from demons is to be saved by the Power of Christ. Belief in Christ must be with the heart by faith. The demons believe the Bible is true and it scares them.
James 2:19 You believe that there is one God. Good! Even the demons believe that-and shudder.
Belief of more than the facts, a belief with the heart will save your soul from ever being destroyed.
Rom 10:9 That if you confess with your mouth, "Jesus is Lord," and believe in your heart that God raised him from the dead, you will be saved. 10 For it is with your heart that you believe and are justified, and it is with your mouth that you confess and are saved. 11 As the Scripture says, "Anyone who trusts in him will never be put to shame." 12 For there is no difference between Jew and Gentile-the same Lord is Lord of all and richly blesses all who call on him, 13 for, "Everyone who calls on the name of the Lord will be saved." 14 How, then, can they call on the one they have not believed in? And how can they believe in the one of whom they have not heard? And how can they hear without someone preaching to them?
Once you believe with your heart a new Spirit enters you.
Eph 1:13 And you also were included in Christ when you heard the word of truth, the gospel of your salvation. Having believed, you were marked in him with a seal, the promised Holy Spirit
This Spirit will remain with you forever, for you are sealed until the day of redemption.
Eph 4:30 And do not grieve the Holy Spirit of God, with whom you were sealed for the day of redemption.
No longer can demons harass you. The devil can no longer have a hold upon you. Once you have been indwelt by the Spirit of God, Satan can easily be resisted. If you resist, he must flee.
James 4:7 Submit yourselves, then, to God. Resist the devil, and he will flee from you.
Satan will never control anyone's soul. There is no battle among the devil and God for your soul. Your soul's fate rests in the hands of God. In God's loving mercy and grace he provided a way for your soul to be protected forever, all you must do is choose to accept that protection. As for Satan, he is not reigning in hell over men's souls, when the end comes he will be in hell suffering with all of those who choose to reject God's offer of salvation.
Rev 20:10 And the devil, who deceived them, was thrown into the lake of burning sulfur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever
"For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.