Lack of faith was not helpful to Jesus in Matthew 13:
58 And he did not do many mighty works there, because of their unbelief.
Jesus healed a blind man at Bethsaida with a bit of delay in Mark 8:
22 And they came to Bethsaida. And some people brought to him a blind man and begged him to touch him. 23And he took the blind man by the hand and led him out of the village, and when he had spit on his eyes and laid his hands on him, he asked him, “Do you see anything?” 24 And he looked up and said, “I see people, but they look like trees, walking.” 25 Then Jesusc laid his hands on his eyes again; and he opened his eyes, his sight was restored, and he saw everything clearly. 26 And he sent him to his home, saying, “Do not even enter the village.”
This healing required a sequence of actions from Jesus. Note that the word "faith" is absent from the above description.
But then, Jesus healed two blind men at the same time without much action from him, Matthew 9:
27 And as Jesus passed on from there, two blind men followed him, crying aloud, “Have mercy on us, Son of David.” 28 When he entered the house, the blind men came to him, and Jesus said to them, “Do you believe that I am able to do this?” They said to him, “Yes, Lord.” 29 Then he touched their eyes, saying, “According to your faith be it done to you.” 30a And their eyes were opened.
Jesus healed a paralytic after seeing his friends' faith in Matthew 9:
9 And getting into a boat he crossed over and came to his own city. 2 And behold, some people brought to him a paralytic, lying on a bed. And when Jesus saw their faith, he said to the paralytic, “Take heart, my son; your sins are forgiven.”
A woman was healed without asking Jesus first in Mark 5:
27 She had heard the reports about Jesus and came up behind him in the crowd and touched his garment. 28 For she said, “If I touch even his garments, I will be made well.” 29 And immediately the flow of blood dried up, and she felt in her body that she was healed of her disease. 30 And Jesus, perceiving in himself that power had gone out from him, immediately turned about in the crowd and said, “Who touched my garments?”
She was able to tap into Jesus' healing power and it worked.
31And his disciples said to him, “You see the crowd pressing around you, and yet you say, ‘Who touched me?’” 32And he looked around to see who had done it. 33But the woman, knowing what had happened to her, came in fear and trembling and fell down before him and told him the whole truth. 34And he said to her, “Daughter, your faith has made you well; go in peace, and be healed of your disease.”
Jesus healed a centurion’s servant without even being there in Luke 7:
8For I too am a man set under authority, with soldiers under me: and I say to one, ‘Go,’ and he goes; and to another, ‘Come,’ and he comes; and to my servant, ‘Do this,’ and he does it.” 9When Jesus heard these things, he marveled at him, and turning to the crowd that followed him, said, “I tell you, not even in Israel have I found such faith.” 10And when those who had been sent returned to the house, they found the servant well.
Jesus healed a Canaanite woman's daughter without being there and only after her insistence in Mat 15:
21And Jesus went away from there and withdrew to the district of Tyre and Sidon. 22And behold, a Canaanite woman from that region came out and was crying, “Have mercy on me, O Lord, Son of David; my daughter is severely oppressed by a demon.” 23But he did not answer her a word.
Jesus wasn't being his usual gracious self, kind of rude
And his disciples came and begged him, saying, “Send her away, for she is crying out after us.”
His disciples found her annoying.
24He answered, “I was sent only to the lost sheep of the house of Israel.” 25But she came and knelt before him, saying, “Lord, help me.” 26And he answered, “It is not right to take the children’s bread and throw it to the dogs.” 27She said, “Yes, Lord, yet even the dogs eat the crumbs that fall from their masters’ table.”
She even picked up Jesus' terminology.
28Then Jesus answered her, “O woman, great is your faith! Be it done for you as you desire.” And her daughter was healed instantly.
While we cannot limit the power of God, there is a good rule of thumb in this: According to your faith be it done to you.
Matthew 14:
31 Jesus immediately reached out his hand and took hold of him, saying to him, “O you of little faith, why did you doubt?”
