=The Emotions Again.= It seems impossible to discuss any psychological principle without finally coming back to the subject of emotions. It truly seems that all roads lead to the instincts and to the emotions which drive them. And so, as we follow the trail of suggestion, we suddenly turn a corner and find ourselves back at our starting-point--the emotional life. Like all other ideas, suggestions get tied up with emotions to form complexes, of which the driving-power is the emotion. If we look into our emotional life, we find, besides the true emotions, with which we have become familiar in Chapter III, a great number of feelings or feeling-tones which color either pleasurably or painfully our emotions and our ideas. On the one hand there are pleasure, joy, exaltation, courage, cheer, confidence, satisfaction; and on the other, pain, sorrow, depression, apprehension, gloom, distrust, and dissatisfaction. Every complex which is laid away in our subconscious is tinted, either slightly or intensely, with its specific feeling-tone. =Emotions--Tonic and Poisonous.= All this is most important because of one vital fact; joyful emotions invigorate, and sorrowful emotions depress; pleasurable emotions stimulate, and painful emotions burden; satisfying emotions revitalize, and unsatisfying emotions sap the strength. In other words, our bodies are made for courage, confidence, and cheer. Any other atmosphere puts them out of their element, handicapped by abnormal conditions for which they were never fashioned. We were written in a major key, and when we try to change over into minor tones we get sadly out of tune. There is another factor; painful emotions make us fall to pieces, while pleasant emotions bind us together. We can see why this is so when we remember that powerful emotions like fear and anger tend to dissociate all but themselves, to split up the mind into separate parts and to force out of consciousness everything but their own impulse. Morton Prince in his elaborate studies of the cases of multiple personality, Miss Beauchamp and B.C.A., found repeatedly that he had only to hypnotize the patient and replace painful, depressing complexes by healthy, happy ones to change her from a weak, worn-out person, complaining of fatigue, insomnia, and innumerable aches and pains, into a vigorous woman, for the time being completely well. On this point he says: