A person becoming stubborn is spoken of as if he stiffens his neck. Alternate translation: "who becomes stubborn" or "who refuses to listen" (See: [[rc://en/ta/man/translate/figs-metaphor]])
"and no one will be able to heal him." Sickness is a metaphor for any kind of bad situation. Alternate translation: "and no one will be able to help him" (See: [[rc://en/ta/man/translate/figs-metaphor]])