Walsh, J. J. (1912). Occupation of mind. In J. J. Walsh, Psychotherapy: Including the History of the Use of Mental Influence, Directly and Indirectly in Healing and the Principles for the Application of Energies Derived from the Mind to the Treatment of Disease (pp. 218-224). New York, NY, US: D Appleton & Company.
http://dx.doi.org/10.1037/10544-030
Two classes of patients frequently apply to physicians for relief from various discomforts. They are, first, people who have no regular occupation and who often are in what is supposed to be the happy position of being able to do just what they please. The second class consists of those who take their occupations too seriously, so that they never get away from them and, as a consequence, disturb their physical functions. The feelings that these two classes complain of--for, when analyzed, their symptoms prove really to be uncomfortable feelings--can usually be "bothered" away and, if not entirely forgotten, made to disappear when the patients become deeply interested in something other than their usual occupation. The first class of patients needs occupation of mind; the second needs diversion of mind, and that subject will be taken up in another chapter. (PsycINFO Database Record (c) 2016 APA, all rights reserved)