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

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.

Pythagoras took the next important step by subordinating the mere matter of nature to its essential principle of form and order, identifying the latter with reason or the soul.

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

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

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.

In Socrates' thought the two marks of individual self-consciousness appear; it is practical and it is social.