Jesus went on to say, “I tell you the truth, some standing here right now will not die before they see the Kingdom of God arrive in great power!”
Six days later Jesus took Peter, James, and John, and led them up a high mountain to be alone. As the men watched, Jesus’ appearance was transformed, and his clothes became dazzling white, far whiter than any earthly bleach could ever make them. Then Elijah and Moses appeared and began talking with Jesus.
Peter exclaimed, “Rabbi, it’s wonderful for us to be here! Let’s make three shelters as memorials—one for you, one for Moses, and one for Elijah.” He said this because he didn’t really know what else to say, for they were all terrified.
Then a cloud overshadowed them, and a voice from the cloud said, “This is my dearly loved Son. Listen to him.” Suddenly, when they looked around, Moses and Elijah were gone, and they saw only Jesus with them.
As they went back down the mountain, he told them not to tell anyone what they had seen until the Son of Man had risen from the dead. So they kept it to themselves, but they often asked each other what he meant by “rising from the dead.”
Then they asked him, “Why do the teachers of religious law insist that Elijah must return before the Messiah comes?”
Jesus responded, “Elijah is indeed coming first to get everything ready. Yet why do the Scriptures say that the Son of Man must suffer greatly and be treated with utter contempt? But I tell you, Elijah has already come, and they chose to abuse him, just as the Scriptures predicted.”
When they returned to the other disciples, they saw a large crowd surrounding them, and some teachers of religious law were arguing with them. When the crowd saw Jesus, they were overwhelmed with awe, and they ran to greet him.
“What is all this arguing about?” Jesus asked.
One of the men in the crowd spoke up and said, “Teacher, I brought my son so you could heal him. He is possessed by an evil spirit that won’t let him talk. And whenever this spirit seizes him, it throws him violently to the ground. Then he foams at the mouth and grinds his teeth and becomes rigid. So I asked your disciples to cast out the evil spirit, but they couldn’t do it.”
Jesus said to them, “You faithless people! How long must I be with you? How long must I put up with you? Bring the boy to me.”
So they brought the boy. But when the evil spirit saw Jesus, it threw the child into a violent convulsion, and he fell to the ground, writhing and foaming at the mouth.
“How long has this been happening?” Jesus asked the boy’s father.
He replied, “Since he was a little boy. The spirit often throws him into the fire or into water, trying to kill him. Have mercy on us and help us, if you can.”
“What do you mean, ‘If I can’?” Jesus asked. “Anything is possible if a person believes.”
The father instantly cried out, “I do believe, but help me overcome my unbelief!”
When Jesus saw that the crowd of onlookers was growing, he rebuked the evil spirit. “Listen, you spirit that makes this boy unable to hear and speak,” he said. “I command you to come out of this child and never enter him again!”
Then the spirit screamed and threw the boy into another violent convulsion and left him. The boy appeared to be dead. A murmur ran through the crowd as people said, “He’s dead.” But Jesus took him by the hand and helped him to his feet, and he stood up.
Afterward, when Jesus was alone in the house with his disciples, they asked him, “Why couldn’t we cast out that evil spirit?”
Jesus replied, “This kind can be cast out only by prayer.”