Note 19 — Chapter III · THE GRADES OF THE FACTORS OF EVOLUTION AND THE ORDER OF THEIR APPEARANCE.
Reading edition
By reason I mean the faculty of dealing with the phenomena of the inner world of consciousness and ideas. Animals live in one world—the outer world of sense; man in two—the outer world of sense, like animals, but also in an inner and higher world of ideas. All that is characteristic of man comes of this capacity of dealing with the inner world. In default of a better word I call it reason. If any one can suggest a better word, I will gladly adopt it.