Oh heavens........................ there is nothing solid in their group experiences!
"Kesey’s novel elucidates some ways that people imprison themselves psychosomatically, using the mind to trap the body. In the case of Chief Bromden, for instance, the Indian has convinced others—maybe even himself—that he is deaf and dumb. This chosen handicap dictates the conditions of even the most mundane moments of his life. Meanwhile, for the rest of the inmates, in group therapy sessions Nurse Ratched uses the power of suggestion to expose their deepest insecurities. We see over and over that belief in a particular ailment seems to induce it. Specifically, in the case of electroshock therapy (EST), given to disturbed patients whenever they misbehave, most of them succumb and find themselves changed negatively by the experience. Chief Bromden, in particular, says that fighting EST was not an option: the fog simply envelops you and warps your brain. But McMurphy teaches him that fighting EST requires willpower, and through focus of mind it can be resisted like much else. Again and again, McMurphy uses his strength to fight the effect of EST, allowing Bromden to follow him and finally escape. There are natural limits—namely, nature itself—to the use of mind over matter. Some people have genuine medical conditions. Ratched herself cannot wish away her large bosom. As for McMurphy, he cannot withstand Ratched's final tool of punishment, the actual removal of part of his brain."