I think one must continue the political struggle, just as a doctor must try to save the life of a patient who is probably going to die. But I do suggest that we shall get nowhere unless we start by recognizing that political behaviour is largely non-rational, that the world is suffering from some kind of mental disease which must be diagnosed before it can be cured.
George Orwell (1903-1950) English writer [pseud. of Eric Arthur Blair]
“As I Please” column, Tribune (1946-11-29)
(Source)
Variant: "Politics is mostly non-rational; the world is suffering from some kind of mental disorder which must be diagnosed before it can be cured."