"Diabetes from sudden mental shock is a true, pure type of a physical malady of mental origin."—Sir B. W. Richardson, in "Discourses."
"In many cases, I have seen reasons for believing that cancer had its origin in prolonged anxiety."—Sir George Paget in "Lectures."
"I have been surprised how often patients with primary cancer of the liver lay the cause of this ill health to protracted grief or anxiety. The cases have been far too numerous to be accounted for as mere coincidences."—Murchison.
"The vast majority of cases of cancer, especially of breast or uterine cancer, are probably due to mental anxiety."—Dr. Snow, in The Lancet.
Dr. Wilks reports cases of jaundice resulting from mental conditions. Dr. Churton, in the "British Medical Journal, reports a case of jaundice arising from anxiety. Dr. Makenzie reports several cases of pernicious anaemia caused by mental shock. Hunter reports "an exciting cause of angina pectoris has long been known to be emotional excitement."
"Eruptions on the skin will follow excessive mental strain. In all these, and in cancer, epilepsy, and mania from mental causes, there is a predisposition. It is remarkable how little the question of physical disease from mental influences has been studied."—Richardson.
"My experiments show that irascible, malevolent and depressing emotions generate in the system injurious compounds, some of which are extremely poisonous; also that agreeable happy emotions generate chemical compounds of nutritious value,
