Mark 9
The transfiguration on the high mountain six days after the Caesarea Philippi confession is the visual confirmation of Peter's confession: Jesus' appearance blazes with divine glory, Moses and Elijah appear to converse with him about his departure, and the heavenly voice repeats the baptismal declaration with the crucial addition — listen to him — placing Jesus above even the greatest figures of the Law and the Prophets. The failed exorcism of the epileptic boy in the valley below provides the chapter's sharpest contrast: from mountain glory to valley failure, from divine declaration to disciples unable to cast out a demon. The father's desperate prayer — I do believe; help me overcome my unbelief — is the Gospel's most honest prayer, and Jesus responds by rebuking the spirit with the permanence clause (never enter him again) and restoring the boy with the lifting hand of resurrection. The private explanation gives the diagnosis: this kind can only come out by prayer, identifying the disciples' failure as a failure of prayerful dependence rather than delegated authority. The second passion prediction (the Son of Man will be delivered into human hands, killed, and rise after three days) is followed by the disciples' argument about which of them is greatest, which Jesus resolves by placing a child in the midst: whoever wants to be first must be servant of all, and whoever receives a child in Jesus' name receives Jesus. The kingdom community's ethics close the chapter: the unauthorized exorcist must not be stopped (whoever is not against us is for us), the millstone seriousness of causing little ones to stumble, the radical-surgery metaphor for removing what causes the self to sin, and the salt saying — have salt among yourselves, and be at peace with each other.