The more one knows the mystery of this phenomenon, the more one learns to understand that there is a world in one's self, that in one's mind there is the source of happiness and unhappiness, the source of health and illness, the source of light and darkness, and that it can be awakened, either mechanically or at will, if only one knew how to do it. Then one does not blame others for his ill fortune nor complain of his fellow man. He becomes more tolerant, more joyful and more loving toward his neighbor, because he knows the cause of every thought and action, and he sees it all as the effect of a certain cause. A physician would not revenge himself on a patient in an asylum, even if the patient hit him, for he knows the cause. Psychology is the higher alchemy, and one must not study it only, without practicing it. Practice and study must go together, which opens the door to happiness for every soul.