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.

Self-preservation is the central aim of all life-activities.

The psycho-physiological hypothesis is both inductively and deductively the sine qua non of the science of psychology.

Mental synthesis of psychic content in the unity of a moment-consciousness is a fundamental principle of psychology.

If society is to progress on a truly humanistic basis, without being subject to mental epidemics and virulent social diseases to which the subconscious falls an easy victim, the personal consciousness of every individual should be cultivated to the highest degree possible.

Science is the description of phenomena and the formulation of their relations.

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