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

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

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.

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.

Plato stands for the union of truth and goodness in the supreme idea of God.

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