A righteous man is one who has an unrestrained and unfettered access to God. This is seen in the place of prayer where he has an audience with God anytime he stands to pray.
1st Peter 3:12
For the eyes of the Lord are over the righteous, and his ears are open unto their prayers: but the face of the Lord is against them that do evil.
Apostle James also harped on this fact. James 5:16 Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.
In the place of prayer, the believer makes power available.
Furthermore, based on this right standing with God, he can drive out demons, lay hands on the sick and they recover and undo every work of Satan.
Mark 16:17 -18
And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues; 18 They shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover.
Confession: I always have audience with God in the place of prayer. I can demonstrate the power of God based on my right standing with God. I am righteous!