Mary F. Porter, Applied Psychology for Nurses
“ But after all, a large number of people whose mental processes are not normal, have only themselves, their poor emotions, their lazy wills, their hazy thinking to blame. We except what are called the heredity insanities—dementia præcox and the other dementias and the manic-depressive groups and paranoia and psychasthenia—for in these cases, possibly with the exception of the manic depressives, even the most perfect environment could probably not prevent the disorder from asserting itself. ”
