Neurograms are concepts and, by the meaning of the concept, they are unconscious. It is not necessary to enter into the question whether they are in their ultimate nature psychical or physical. That is a philosophical question.[72] They are at any rate unconscious in this sense; they are devoid of consciousness, i.e., have none of the psychological attributes of any of the elements of consciousness, and in the sense in which any physiological arrangement or process is not conscious, i.e., is unconscious. We have here, then, in the concept of brain residual neurograms the fundamental meaning of the _Unconscious_.[73] _The unconscious is the great storehouse of neurograms which are the physiological records of our mental lives._ By the terms of the concept neurograms are primarily passive—the potential form, as it were, in which psychical energy is stored. This is not to say, however, that, from moment to moment, certain ones out of the great mass may not become active processes. On the contrary, according to the theory of memory, when certain complexes of neurograms are stimulated they take on activity and function—the potential energy becomes converted into dynamic energy. In correlation with the functioning of such neurographic complexes, the complexes of ideas which they conserve—the psychological equivalents—are reproduced (according to the doctrines of monism and parallelism) and enter the stream of the personal consciousness. The unconscious becomes the conscious (monism), or provided with correlated conscious accompaniments (parallelism), and we may speak of the ideas arising out of the unconscious. =Neurograms may also function as subconscious processes exhibiting intelligence and determining mental and bodily behavior.=—Here two important questions present themselves. Is it a necessary consequence that when unconscious neurograms become active processes psychological equivalents must be awakened; and when they are awakened, must they _necessarily_ enter the stream of the personal consciousness? If both these questions may be answered in the negative, _then plainly in either case such active processes become by definition subconscious processes_—of an _unconscious_ nature in the one case and of a _coconscious_ nature in the other. They would be subconscious because in the first place they would occur outside of consciousness and there is no awareness of them, and in the second place they would be a dissociated second train of processes distinct from those engaged in the conscious stream of the moment. Theoretically such subconscious processes, whether unconscious or coconscious, might perform a variety of functions according to the specificity of their activities.