Bergson distinguishes between two different forms of memory.
Bergson accused classical metaphysics of misrepresenting its assumed problems, and of being guilty of posing secondary problems as being principal. The problem posed by Bergson was thus well known, but he redefined the way of posing it. Each of his four main works follows the same principle — responding to a precisely posed problem; in Matter and Memory, Descartes's problem of spirit and body — stated as being two substances with different attributes. Descartes's fault lies in defining matter and memory as substances or res, thus not separating them distinctly.
Bergson really does distinguish the spirit from the body, but as opposed to in Descartes's classical philosophy, the distinction resides in the temporal domain, not in the spatial. The spirit is the abode of the past; the body of the present; the soul or spirit always anchored in the past, not residing in the present; lodged in the past, and contemplating the present. To have or take consciousness of anything, means looking at it from the viewpoint of the past, in light of the past. Contenting oneself with reacting to an external stimulus means being unconscious of the act; an existence within the sheer presence of the body. Consciousness means, invariably, delaying reaction to stimuli; the interval accompanied by the conscious awareness that the spirit is anchored within the past. One becomes conscious while being anchored in the past, in light of the past, in view of appropriate action directed towards the immediate future. The articulation of time — past, present, future — finds place through the union of spirit and body. The more the spirit descends into the past, the more one becomes conscious. The more one acts automatically, the more one exists in the present, in the temporal domain of the body. And one always stays within one domain or the other. True awareness necessitates the united action of body and spirit. According to Bergson, the "impulsive person" suspends his consciousness and stays within the unreflective domain of automatism.
Bergson contended that we do not know our bodies only "from without" by perceptions, but also "from within" by affections.
Present developments of modern selectionist theories of memory in cognitive science seems to confirm Bergson's theories.1 Selectionist models offer new and potentially useful approaches to a theory of remembering. On the model of natural selection, these selectionist theories require at least two processing components: a device which generates a range of memory representations and a selection process which preserves a subset of those representations. Bergson shows how the subjective experience of remembering might be understood within a selectionist framework.
The book is considered to be a major philosophical contribution to the analysis of implicit memory.2
McNamara, Patrick (1996). "Bergson's "Matter and Memory" and Modern Selectionist Theories of Memory". Brain and Cognition. 30 (2): 215–31. CiteSeerX 10.1.1.466.7035. doi:10.1006/brcg.1996.0014. PMID 8811999. /wiki/Patrick_McNamara_(neuroscientist) ↩
Schacter, D. (1987). "Implicit memory: History and current status". Journal of Experimental Psychology: Learning, Memory, and Cognition. 13 (3): 501–518. doi:10.1037/0278-7393.13.3.501. /wiki/Daniel_Schacter ↩