Once enlightened, so to speak, the freed prisoner would not want to return to the cave to free "his fellow bondsmen". Plato argues that he must be persuaded or compelled to do so. Another problem lies in the other prisoners not wanting to be freed: descending back into the cave would require that the freed prisoner's eyes adjust again, and for a time, he would be one of the ones identifying shapes on the wall. His poor eyesight would severely impair his ability to name the shapes, and thus the other prisoners would dislike him to the degree that they have no trust in him and thus take his attempts to free them with murderous aggression. His once-companions eventually kill him for his unwanted attempts to free them.
social control philosophy cave reality habit