Mark 9:20-23

So they brought him. When the spirit saw Jesus, it immediately threw the boy into a convulsion. He fell to the ground and rolled around, foaming at the mouth. Jesus asked the boy’s father, “How long has he been like this?” “From childhood,” he answered. “It has often thrown him into fire or water to kill him. But if you can do anything, take pity on us and help us.” “ ‘If you can’?” said Jesus. “Everything is possible for one who believes.”