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.

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

The main source of psychopathic diseases is the fundamental instinct of fear with its manifestations, the feeling of anxiety, anguish, and worry.

Psychology must postulate uniformity of interrelation of physical, physiological, and psychic processes.

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

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