2 Corinthians 4:4 - "Satan, who is the god of this world, has blinded the minds of those who don’t believe. They are unable to see the glorious light of the Good News. They don’t understand this message about the glory of Christ, who is the exact likeness of God." NLT
If you have been interceding for your brother there is nothing wrong with him except the devil! No human being who truly understood the salvation Jesus offers would reject it of his own free will. Why then are so many people still unsaved?
Second Corinthians 4:4 tells us that the devil is the one who hs blinded their minds. Once you realize that it's the devil -- not your loved one -- who's the real problem, your first prayer step becomes clear. You must get the devil out of your brother's way. Jesus said you can't enter into a strong man's house, and spoil his goods, except you first bind the strong man (Mathew 12:29).
So bind him. Say "You spirit operating in the life of my loved one blinding him/her to the gospel to keep him/her out of the kingdom of God, I bind you now. I belong to the Lord Jesus Christ. I carry His authority and righteousness and in His Name I command you to desist in your maneuvers. I spoil your house according to the Word of God, and I enter into it to deliver my loved one from your hands."
Next, in Matthew 9:37 Jesus, looking out at the multitudes who needed ministry, said to His disciples, "Pray you, therefore, the Lord of the harvest, that He will send forth laborers into His harvest." It's the Word of God that brings faith for salvation (Romans 10:17). See to it that the Word comes across your loved one's path.
He may not listen to you but God knows who he will listen to, and He'll send that person a far distance to talk to your loved one if necessary.
Now, put your faith into action by treating him like he/she is saved -- not like he/she is no good. Talk to him/her about the good things of God the way you would if he/she were already born again. Then stand back and watch how things change.
ALBERT FINCH MINISTRY