The tendency of life is not the preservation of the species, but solely the preservation of each individual organism, as long as it is in existence at all, and is able to carry on its life processes.

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

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

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

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

The tendency of life is not the preservation of the species, but solely the preservation of each individual organism, as long as it is in existence at all, and is able to carry on its life processes.

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.