Physical exercise and labor combined have a happy influence upon the mind, strengthen the muscles, improve the circulation, and give the invalid the satisfaction of knowing his own power of endurance; whereas, if he is restricted from healthful exercise and physical labor, his attention is turned to himself. He is in constant danger of thinking himself worse than he really is and of having established within him a diseased imagination which causes him to continually fear that he is overtaxing his powers of endurance. As a general thing, if he should engage in some well-directed labor, using his strength and not abusing it, he would find that physical exercise would prove a more powerful and effective agent in his recovery than even the water treatment he is receiving. {4T 94.2}

Legemsøvelse og arbejde kombineret med hinanden har en heldig indflydelse på sindet, styrker musklerne, forbedrer kredsløbet og giver den syge oprejsning ved at kende sin udholdenhed; hvorimod, var han afskåret fra legemsøvelser og fysisk arbejde, ville han kun have opmærksomheden rettet mod sig selv. Han kan let komme til at se sig selv som værre end han i virkeligheden har det og bilde sig selv ind han er syg, hvilket får ham til at tro, at han overbebyrder sin egen styrke. Generelt burde han gå ind i et eller andet målrettet arbejde, bruge sine kræfter og ikke misbruge dem. Da vil han finde ud af, at legemsøvelser er et bedre redskab til at helbrede ham end den vandbehandling han får.