1. The nature of instinct: The babe's dependence on instinct--Definition of instinct--Unmodified instinct is blind. 2. Law of the appearance and disappearance of instincts: Instincts appear in succession as required--Many instincts are transitory--Seemingly useless instincts--Instincts to be utilized when they appear--Instincts as starting points--The more important human instincts. 3. The instinct of imitation: Nature of imitation--Individuality in imitation--Conscious and unconscious imitation--Influence of environment--The influence of personality. 4. The instinct of play: The necessity for play--Play in development and education--Work and play are complements. 5. Other useful instincts: Curiosity--Manipulation--The collecting instinct--The dramatic instinct--The impulse to form gangs and clubs. 6. Fear: Fear heredity--Fear of the dark--Fear of being left alone. 7. Other undesirable instincts: Selfishness--Pugnacity, or the fighting impulse. 8. Problems in observation and introspection . . . . . . . . . . . . . 201 CHAPTER XIV FEELING AND ITS FUNCTIONS 1. The nature of feeling: The different feeling qualities--Feeling always present in mental content--The seeming neutral feeling zone. 2. Mood and disposition: How mood is produced--Mood colors all our thinking--Mood influences our judgments and decisions--Mood influences effort--Disposition a resultant of moods--Temperament. 3. Permanent feeling attitudes, or sentiments: How sentiments develop--The effect of experience--The influence of sentiment--Sentiments as motives. 4. Problems in observation and introspection . . . . . . . . . . . . . . 226 CHAPTER XV THE EMOTIONS 1. The producing and expressing of emotion: Physiological explanation of emotion--Origin of characteristic emotional reactions--The duration of an emotion--Emotions accompanying crises in experience. 2. The control of emotions: Dependence on expression--Relief through expression--Relief does not follow if image is held before the mind--Growing tendency toward emotional control--The emotions and enjoyment--How emotions develop--The emotional factor in our environment--Literature and the cultivation of the emotions--Harm in emotional overexcitement. 4. Emotions as motives: How our emotions compel us--Emotional habits. 5. Problems in observation and introspection . . . . . . . . . . . . . . 239 CHAPTER XVI INTEREST