The social worker is also an essential aid to the physician in bringing to light the mental torments and errors which result from difficult personal relations within the family. These difficulties can only be understood by one who visits the patient in his home, becomes intimate and friendly with other members of his family, and understands, therefore, the difficulties that may arise from friction, rivalry, jealousy, and temperamental incompatibility within the home. In some cases the patient's friends and companions in work or school must also be understood. In other words, one must take account of the totality of influences in the patient's environment, the physical influences of nutrition, ventilation, clothing, but also the psychical influences exerted upon him by his family and friends, by his own half-conscious thoughts, by his worries, his remorse, his fears. Many a case of stomach trouble cannot be cured by diet or remedies until one can find out what it is that the patient is worrying about and can enable him to combat and subdue his mental enemies. Innumerable vague pains which the doctor cannot attribute to any organic disease, and for which the use of drugs is only too likely to do harm, yield only when one can study and influence the whole extent of the patient's mental, moral, and spiritual life. Nothing can be excluded here. It is utterly unscientific to close our eyes to any human interest no matter how little we may sympathize with it personally. It is one of the facts of the case, and must be understood and allowed for in our treatment.