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

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

Superstitions, and especially the early cultivation of religion, with its "fear of the Lord" and of unknown mysterious agencies, are especially potent in the development of the instinct of fear. Even the early cultivation of morality and conscientiousness, with their fears of right and wrong, often causes psychoneurotic states in later life. Religious, social, and moral taboos and superstitions, associated with apprehension of threatening impending evil, based on the fear instinct, form the germs of psychopathic affections.

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

The man of genius whether as artist or thinker requires a mass of accidental variations to select from and a rigidly selective process of attention.

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

Human institutions depend for their existence and stability on the impulse of self-preservation and its close associate, - the fear instinct.