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

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.

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

Psychology is the science of psychic states both as to content and form, regarded from an objective standpoint, and brought in relation to the living corporeal individual.

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