In studying the psychology of the individual, sleep, madness, delirium, somnambulism,
hallucination offer a far more favourable field of experience than the normal state.
Phenomena which in the normal state are almost effaced because of their tenuousness
appear more palpable in extraordinary crises because they are exaggerated... human
psychology will have to be constructed by studying the madness of mankind, the dreams
and hallucinations to be found on every page of the history of the human spirit. Ernest …