Psychology is to be treated as a natural science. In addition, psychology assumes additional data peculiarly as her own. These mental facts are adapted in advance to the features of the world in which we dwell. The purpose of consciousness is to assist individuals to adapt to their environment. The purpose of this adaptation is to secure the individuals' welfare .
All states of mind are motor in their consequences.
The coming to pass of thought is a consequence of mechanical laws, for, according to a working hypothesis of physiology, the laws of brain-action are at bottom mechanical laws. It will doubtless take several generations of psychologists to test the hypothesis of dependence with anything like minuteness.