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

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

Feeling is the consciousness of the resulting conditions - of success, failure, equilibrium, compromise or balance, in this continuous rivalry of ideas.

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

In the first place, Descartes stands for the most explicit and uncompromising dualism between mind and matter.

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