根据以下材料，回答题
Mr.Smith was a wealthy industrialist, but he was not satisfied with life.He did not sleep well andhis food did not agree with him.This situation lasted for some time.Finally, after several sleeplessnights, he decided to consult his doctor.The doctor advised a change of surroundings."Go abroad," hesaid."But I' m not good at foreign language," said Mr.Smith."It doesn' t matter," said the doctor."Itwon' t hurt you to talk a little less.Go on a voyage.Take plenty of exercise.Try to reduce your weight.Avoid rich food."
Mr.Smith went to Switzerland.He did not know French or German, and had to communicatethrough gestures.He attended a physical training course.The instructor made him bend his knees, swinghis arms, stretch his neck and shake his head rapidly.He had to lie on the ground and raise his right andleft legs alternately.After a time his muscles grew hard and firm.He forgot the financial crisis and theimportance of raising the level of production.He even began to notice individual trees and individualbirds.
Finally he returned home.But unfortunately his improvement was only temporary.Soon he was anormal businessman again, worried about his property, his profits, his savings, his advancement in atechnological society, and things in general.
Mr.Smith went to see his doctor because he________.