Actually, you don’t differ from Szasz on “whether a brain can have a disease.” Brain diseases exist, and they are treated in the field of neurology and standard medicine. Possibly you’re confusing “mind” with “brain”? Szasz says that a “mind” cannot have a disease.* And he’s right of course, because the mind is not physical. The brain is physical. Understanding just this one basic concept better, would cause an overhaul of psychiatry all by itself. * Neither can behaviour be a disease. But behaviour can be a symptom of a disease. It’s a distinction far more important than people realise.