Harmony to Be Preserved Between Mental and Physical Powers—We lose or gain physical strength just in accordance with the way in which we treat the body. When the largest portion of time is devoted to brain work, the organs of imagination lose their freshness and power, while the physical organs lose their healthy tone. The brain is morbidly excited by being constantly exercised, while the muscular system is weak from lack of exercise. There is a manifest loss of strength and increase of debility, which in time makes its influence felt on the brain. As far as possible, harmony should be preserved between the mental and physical powers. This is necessary for the health of the entire system.—Lt 53, 1898. {2MCP 509.1}

Harmoni bevares mellem mental og fysiske kræfter — Vi mister eller vinder fysisk i overensstemmelse med den måde vi behandler kroppen på. Når det meste af tiden bruges på hjernearbejde, mister fantasien sin friskhed og kraft, medens de psykiske organer mister deres sunde tone. Hjernen overanstrenges sygeligt ved at hele tiden overbebyrdes, medens muskelsystemet er svagt og mangler øvelse. Der er en udtalt mangel på styrke og forøget svaghed som til tider har sin indflydelse på hjernen. Harmoni bør så vidt muligt bevares mellem de mentale og fysiske kræfter. Dette er nødvendigt for hele organismens sundhed. — Brev 53, 1898.