It could not actually
come from them since the brain is an image like others, enveloped in the
mass of other images, and it would be absurd that the container should
issue from the content. But since the structure of the brain is like the
detailed plan of the movements among which you have the choice, and
since that part of the external images which appears to return upon
itself, in order to constitute perception, includes precisely all the
points of the universe which these movements could affect, conscious
perception and cerebral movement are in strict correspondence. The
reciprocal dependence of these two terms is therefore simply due to the
fact that both are functions of a third, which is the indetermination of
the Will."[Footnote: Matter and Memory, p. 35 (Fr. p. 29).]
Moreover, we must recognize that the image is formed and perceived in
the object, not in the brain, even although it would seem that rays of
light coming from a point P are perceived along the path of the sensori-
motor processes in the brain and are afterwards projected into P. There
is not, however, an unextended image which forms itself in consciousness
and then projects itself into the position P. Really, the point P, and
the rays which it emits, together with the retina and nervous elements
affected in the process of perception, all form a single whole. The
point P is an indispensable factor in this whole and it is really in P
and not anywhere else that the image of P is formed and
perceived.
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