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

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

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

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

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

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.

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.