The principle of recognition of evil under all its guises is at the basis of the true education of man.

Not purpose but chance is at the heart of mental life.

Suggestibility varies as the amount of disaggregation, and inversely as the unification of consciousness.

The recognition, the diagnosis, and the preservation of psychopathic individuals account for the apparent increase of neurotics in civilized communities.

The course of evolution is to a greater integration of similarly functioning ganglia.

The fact that psychology postulates an external material world and studies it in so far as it comes to be reflected in consciousness, points to another postulate which psychology must assume in addition, namely, the existence of an inner world consciousness.

The general tendency of evolution is from structure to function, from bondage to freedom of the individual elements.