Frequent reference has already been made to individual delusions, errors, and misconceptions of a more or less harmful nature associated with our mental and physical efforts in the different rounds of daily life. I wish now to draw special attention to those which may be said to have a more strictly personal bearing than those referred to heretofore, and which have not been fully recognised despite the fact that they are forerunners of unusually harmful and persistent bad habits. The individual misconceptions, errors, and delusions to which I refer are indicated in the cases which follow. They are the direct result of most laudable attempts to accomplish something considered necessary to the welfare of life, something which seemed essential to success in life, something which was felt to be a worthy achievement in life. Among these I would instance: The attempt to bring about some change considered necessary in the shape or use of a part or parts of the physical organism, and to conceal or change some supposed or real psycho-physical peculiarity, weakness, or defect. The clinging to erroneous reasoning, in the face of undoubted evidence which revealed the errors in such reasoning, regarding the mode of procedure adopted in the attempt to prevent or “cure” attacks of illness and painful or disagreeable experiences. The decision that a certain condition is present, and the definite conclusion as to its degree of harmfulness or the extent of its general effect upon the organism, or its influence upon the daily conduct of life. The attempt to remedy what the subject considers a lack of concentration. The attempt to gain benefit by relaxation in consequence of the recognition of undue tension of the muscular mechanisms, not only in physical acts, but also during the attempt to rest by sitting in a chair, lying on a bed or couch, etc. The detection by the subject of symptoms which are always considered serious and call for immediate eradication and future prevention. The original conception in this connexion is influenced by warped and incorrect subconscious experiences, and consequently a narrow and perverted view is taken of the conditions present. The “one-brain-track” method is in operation and the _modus operandi_ adopted by the subject is therefore deduced from false premises. Symptoms are considered causes and furthermore the chief aim of the subject in practical procedure is the attainment of the “end” desired, not the due and proper considered analysis of the “means whereby” which will secure that “end.”