The reason of the close concurrence between the individuals progress and that of the race appears, therefore, when we remember the dependence of each upon the other.

The development of the meaning attaching to the personal self, the conscious being, is the subject matter of the history of psychology.

The dualism itself becomes a sort of presupposition or datum; its terms condition the further problem.

Psychology more than any other science has had its pseudo-scientific no less than its scientific period.

All along we find that social life - religion, politics, art - reflects the stages reached in the development of the knowledge of self; it shows the social uses made of this knowledge.

Like all science, psychology is knowledge; and like science again, it is knowledge of a definite thing, the mind.

The fact that tradition hinders the individual savage from thinking logically by no means proves that he cannot think logically.