The purpose of the study was to develop a theory and model for motivity of consciousness which would constitute a system of thought motivity. The major premises of currently prominent theories of motivation, including psychoanalysis, learning theory, self-actualization theory, and topological psychology, were surveyed. Related materials in the area of psychic research and energy systems related to mental function were surveyed. The primary activities and processes called thought motivity were identified along with some of the major forces on the individual. From the identified forces and processes a theory of thought motivity was developed. A conceptual model for motivity of consciousness based upon the theory was designed. The theory and the model considered together constituted the system of thought motivity. Brain processes and biological actions of the human organism were proposed to have a functional, interdependent relationship. Thought was considered to be a functional of brain processes. It was postulated that a certain minimal level of biological actions were continuous in the living organism; therefore, thought was continuous. It was postulated that at any given point in time and space a universe of events would exist which was capable of producing outcomes in the brain. Of that universe of events a field of events was likely to produce outcomes in the brain. Of those events likely to produce outcomes in the brain a region of events would produce outcomes. The net relationship between the universe of events, the field of events, and the region of events was one of decreasing quantity of stimuli. The universe of events was postulated to include stimuli which affected the brain through sensory organs and other receptors. Events which produced outcomes in the brain and were not received through sensory organs were proposed to operate through para-sensory receptors in the brain. As a functional of a universe of events and biological. actions, each of which had a nature of constancy and change, thought was postulated to be subject to constant motivity. Thought motivity was proposed to be a process of differentiation and integration of events as reflected by outcomes produced in the brain. At any given point in time and space, brain processes were theorized to be limited by experiential factors, the universe of events, and the functionals of brain processes.