ABSTRACT
Mental events were divided into knowing, willing, and feeling. Attempts were made to define perception and sensation, and in general the subject was one for verbal analysis of concepts that the philosophers had rendered familiar though not intelligible. Psychology as pursued everywhere in the past was incapable of giving practical control over mental processes, and never aimed at this result. All modern scientific thinking is at bottom power thinking, that is to say, the fundamental human impulse to which it appeals is the love of power, or, to express the matter in other terms, the desire to be the cause of as many and as large effects as possible. Freud's purposes were primarily therapeutic. He was concerned to cure people of the less extreme forms of mental disorder. In the course of this attempt he was led to a view as to the causation of such troubles.
