17 And whenever it takes hold of him, it throws him down, and he foams and gnashes with his teeth, and he becomes unconscious. And I asked your disciples to cast him out, and they could not."
18 And answering them, he said: "O unbelieving generation, how long must I be with you? How long shall I endure you? Bring him to me."
19 And they brought him. And when he had seen him, immediately the spirit disturbed him. And having been thrown to the ground, he rolled around foaming.
20 And he questioned his father, "How long has this been happening to him?" But he said: "From infancy.
21 And often it casts him into fire or into water, in order to destroy him. But if you are able to do anything, help us and take pity on us."
22 But Jesus said to him, "If you are able to believe: all things are possible to one who believes."
23 And immediately the father of the boy, crying out with tears, said: "I do believe, Lord. Help my unbelief."