Hypothesis regarding the relation between the nutritive organs and the brain—Perversion of the instincts relating to nutrition—Pathology of hunger and thirst—Proofs furnished of the priority of these tendencies in relation to pleasure and pain—Facts in support of this—Negative tendency; disgust—Its biological value as a protective instinct. CHAPTER II. FEAR 207 Fear the conservative instinct under its defensive form—Physiology—Psychology—First stage: Instinctive fear—Hypothesis of heredity—Second stage: Fear founded on experience—Pathology—Morbid or pathological fears—Two periods in their study—Attempts at classification—How are they derived from normal fear? Two groups, connected respectively with fear and disgust—Inquiry into the immediate causes: events in life of which a recollection has been retained; of which no recollection has been retained—Occasional transformation of a vague state into a precise form. CHAPTER III. ANGER 218 Anger the conservative instinct in its offensive form—Physiology—Psychology—Anger passes through two stages, one simple, the other mixed—Its evolution—Animal form, or that of actual aggression—Emotional form, or that of simulated aggression—Appearance of a pleasurable element—Intellectualised form, or that of deferred aggression—Pathology: Epileptic insanity, corresponding to the animal form; the maniacal state, corresponding to the affective form—Disintegrated forms of anger—Overpowering tendencies to destructiveness—How do they arise and take a definite direction?—Return to the reflex state—Essential cause: temperament—Accidental causes. CHAPTER IV. SYMPATHY AND THE TENDER EMOTIONS 230 Sympathy is not an instinct, but a highly generalised psycho-physiological property—Complete sense and restricted sense—Physiological phase: imitation—Psychological phase: first stage, psychological unison; second stage, addition of tender emotion—Tender emotion—Its physiological expression—Its relations with touch—The smile—Tears: hypotheses as to their causes—Tender emotion indecomposable. CHAPTER V. THE EGO AND ITS EMOTIONAL MANIFESTATIONS 239