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 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.

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

The prehistorical and primitive period represents the true infancy of the mind.

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