The will is particularly capable of removing obstacles to nutrition that have often hampered the activities and sometimes seriously impaired the health of patients. Many people are not eating enough for one reason or another and need to have their diet regulated, not in {110} the direction of a limitation or selection of food, though this appeals to so many people under the term dieting, but so that they shall eat enough and of the proper variety to maintain their health and bodily functions. A great many nervous diseases are dependent on lack of sufficient food. Eating in those who lead sedentary lives much indoors is ever so much more a matter of will than of appetite. When people say that they eat all they want to, what they mean, as a rule, is that they eat all that they have formed the habit of eating. Other habits can readily be formed and will often do them good. For a great many of the less serious symptoms which make people valetudinarians, nervous indigestion, insomnia, tendencies to headache, queer feelings in the head, constipation, the proper habit secured by will power, of eating so as to secure sufficient food, is the most important single factor. This the will must be trained to accomplish. Now that disease prevention has become even more important than cure, the will is an extremely efficient element. Air, food, exercise are important factors for healthy living. A great many people are neglecting them and then seem surprised that they should suffer from various symptoms of impaired {111} functioning of bodily organs. Many men and a still greater number of women are staying in the house so much that their oxidation within the body is at a low ebb, and it is no wonder that vital processes are not carried on to the best advantage. Our generation has eliminated exercise from life to a great extent, and now that the auto and the trolley car limit walking, not only the feet of mankind suffer severely, but all the organs in the body work at a disadvantage for lack of the exercise that they should have. No wonder that under the circumstances appetite is impaired and other functions of the body suffer. Instead of simple foods various artificial stimulants are employed--such as alcohol, spices, and the like--to provoke appetite, often with serious consequences for the digestive organs. The will to be well includes the willing of the means proper to that purpose, and particularly regular exercise, several hours a day in the air, good simple food taken in sufficient quantity at three regular intervals and the avoidance of such sources of worry as will disturb physical functions. {112} CHAPTER VIII PAIN AND THE WILL "That the will is infinite and the execution confined." _Troilus and Cressida_.