We have people in authority over us: teachers, managers, police officers, and so on. On their own they are just other human beings that do not have authority over us. They cannot tell us what to do because they have no authority. In the authority given to them through their professions: teachers have authority over students, managers have authority over employees, police officers have authority over people in their jurisdiction.
This is the same with our authority in Christ. We alone do not have the power to heal or cast out demons, but we have authority in Christ as believers to cast out demons and heal the sick in the name of Jesus.
Luke 9:1-2 “When Jesus had called the Twelve together, he gave them power and authority to drive out all demons and to cure diseases, and he sent them out to proclaim the kingdom of God and to heal the sick.”
In the book of Acts, Peter healed a man just by speaking it. It illustrates the power believer’s have over sickness IN JESUS’ NAME, not in their own power.
Acts 3:6-8 “Then Peter said, “Silver or gold I do not have, but what I do have I give you. In the name of Jesus Christ of Nazareth, walk.” Taking him by the right hand, he helped him up, and instantly the man’s feet and ankles became strong. He jumped to his feet and began to walk. Then he went with them into the temple courts, walking and jumping, and praising God.”
Peter did not ask of God “Lord please heal him”. Peter exercised his faith and authority in Christ and commanded the healing. He said, “In the name of Jesus Christ of Nazareth, walk.” There is power in the name of Jesus.
After this happened Peter knew people would think he and John had some godly power. Peter was quick to correct them and give all credit and glory to God. We do not have the power, but we have the authority, as believers in Christ, to call on the power of the Lord to heal the sick.
Acts 3:12,16 “When Peter saw this, he said to them: “Fellow Israelites, why does this surprise you? Why do you stare at us as if by our own power or godliness we had made this man walk? … By faith in the name of Jesus, this man whom you see and know was made strong. It is Jesus’ name and the faith that comes through him that has completely healed him, as you can all see.”
We should not be surprised to see miracles, signs, and wonders. If you’re a believer, be encouraged and walk in the authority we have IN CHRIST.