feelings; there is no causation between them; the
series of feelings which constitutes a life can be ar-
ranged in a classified order, but the former members
of the series do not contain the cause of the later
members. Neither do feelings react upon, or con-
tain the causes of, subsequent states of the nervous
organism upon which other feelings depend. The
sequences and combinations of feelings form, as it
were, a kind of mosaic picture, the separate stones
of which both support the picture and keep each
other in their places; the stones are the states of the
nervous organism, the colours on the stones the states
of consciousness which are supported by the nerve
states. The states of consciousness, the feelings, are
effects of the nature, sequence, and combination, of
the nerve states, without being themselves causes
either of one another or of changes in the nerve
states which support them. In enquiring, therefore,
into the origin and laws of movement of feelings or
states of consciousness, the nature and modes of ac-
tion of the nervous organism and its various parts
are the first object of investigation; and the origin
and laws of movement of feeling will be so far only
explained as we may succeed in attaching them to
their proper causes in the nature and working of the
nervous organism. I have not now to argue the
point, that the origin of consciousness is to be found
only in the nervous organism; that was done in
"Time and Space,"Chapter iii. But that all sub-
sequent changes in consciousness are due only to
changes in the nervous organism, so far as this is
not a logical consequence or corollary of the former
point, must be here assumed, as at any rate the only
hypothesis in accordance with it, and must expect

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