So are you saying that if Jesus tried to heal person A and person B from leprosy it would work on person A if they believed it was true that Jesus was God and could heal them, but if person B had doubts then the attempted healing wouldn’t work?
I had the question many years ago, (Is the Faith of the person being Prayed for necessary for their healing?
I found three examples of Healing which show just how any Healing works or takes place.
1).
Mat. 9:20
And, behold, a woman, which was diseased with an issue of blood twelve years, came behind him, and touched the hem of his garment:
Mat 9:21 For she said within herself, If I may but touch his garment, I shall be whole.
Mat 9:22 But Jesus turned him about, and when he saw her, he said, Daughter, be of good comfort; thy faith hath made thee whole. And the woman was made whole from that hour.
2).
Mark 2:1 And again he entered into Capernaum after some days; and it was noised that he was in the house.
Mar 2:2 And straightway many were gathered together, insomuch that there was no room to receive them, no, not so much as about the door: and he preached the word unto them.
Mar 2:3 And they come unto him, bringing one sick of the palsy, which was borne of four.
Mar 2:4 And when they could not come nigh unto him for the press, they uncovered the roof where he was: and when they had broken it up, they let down the bed wherein the sick of the palsy lay.
Mar 2:5 When Jesus saw their faith, he said unto the sick of the palsy, Son, thy sins be forgiven thee.
Mar 2:6 But there were certain of the scribes sitting there, and reasoning in their hearts,
Mar 2:7 Why doth this man thus speak blasphemies? who can forgive sins but God only?
Mar 2:8 And immediately when Jesus perceived in his spirit that they so reasoned within themselves, he said unto them, Why reason ye these things in your hearts?
Mar 2:9 Whether is it easier to say to the sick of the palsy, Thy sins be forgiven thee; or to say, Arise, and take up thy bed, and walk?
Mar 2:10 But that ye may know that the Son of man hath power on earth to forgive sins, (he saith to the sick of the palsy,)
Mar 2:11 I say unto thee, Arise, and take up thy bed, and go thy way into thine house.
Mar 2:12 And immediately he arose, took up the bed, and went forth before them all; insomuch that they were all amazed, and glorified God, saying, We never saw it on this fashion.
3).
John 5:1 After this there was a feast of the Jews; and Jesus went up to Jerusalem.
Joh 5:2 Now there is at Jerusalem by the sheep market a pool, which is called in the Hebrew tongue Bethesda, having five porches.
Joh 5:3 In these lay a great multitude of impotent folk, of blind, halt, withered, waiting for the moving of the water.
Joh 5:4 For an angel went down at a certain season into the pool, and troubled the water: whosoever then first after the troubling of the water stepped in was made whole of whatsoever disease he had.
Joh 5:5 And a certain man was there, which had an infirmity thirty and eight years.
Joh 5:6 When Jesus saw him lie, and knew that he had been now a long time in that case, he saith unto him, Wilt thou be made whole?
Joh 5:7 The impotent man answered him, Sir, I have no man, when the water is troubled, to put me into the pool: but while I am coming, another steppeth down before me.
Joh 5:8 Jesus saith unto him, Rise, take up thy bed, and walk.
Joh 5:9 And immediately the man was made whole, and took up his bed, and walked: and on the same day was the sabbath.
These three examples demonstrate,
1). The Faith of the one being Healed.
2). The Faith of others for the one being Healed, but not through their Prayer for them.
3). The Faith of Jesus Praying for the one being Healed, regardless of the Persons Faith.
#3 is a demonstration of Jesus Authority being used.
Now there is a fourth demonstration of Faith and Authority of Christ in action.
4).
Acts 3:1 Now Peter and John went up together into the temple at the hour of prayer, being the ninth hour.
Act 3:2 And a certain man lame from his mother's womb was carried, whom they laid daily at the gate of the temple which is called Beautiful, to ask alms of them that entered into the temple;
Act 3:3 Who seeing Peter and John about to go into the temple asked an alms.
Act 3:4 And Peter, fastening his eyes upon him with John, said, Look on us.
Act 3:5 And he gave heed unto them, expecting to receive something of them.
Act 3:6 Then Peter said, Silver and gold have I none; but such as I have give I thee: In the name of Jesus Christ of Nazareth rise up and walk.
Act 3:7 And he took him by the right hand, and lifted him up: and immediately his feet and ankle bones received strength.
Act 3:8 And he leaping up stood, and walked, and entered with them into the temple, walking, and leaping, and praising God.
Act 3:9 And all the people saw him walking and praising God:
Act 3:10 And they knew that it was he which sat for alms at the Beautiful gate of the temple: and they were filled with wonder and amazement at that which had happened unto him.
#4 is the demonstration of the Authority of Jesus through the Holy Spirit by the Believer for the one being Healed.
But as with all the Healing's it is the Holy Spirit of God doing the Healing, but all accomplished by FAITH.