CHAPTER XI.

THE INTELLECTUAL SENTIMENT 368

Its origin: the craving for knowledge—Its evolution—Utilitarian period: surprise, astonishment, interrogation—Disinterested period: transition forms—Classification according to intellectual states—Classification according to emotional states: dynamic forms, static forms—Period of passion: its rarity—Pathology—Simple doubt—Dramatic doubt—_Folie du doute_—Mysticism in science: deviation comes, not from the object, but from the method of research.