case is different. We have seen that many people hold
emotions to be complexes of pleasure-pain in representation;
or to be special kinds of pleasures and pains or reactions
upon such. All these views we have seen reason to oppose.
The question remains, What are these emotions? I think it
is worth while, before proceeding further in our examination
of pleasure-pain laws, to attempt an answer to this question,
which I do in Chap. II., and to develop further (as I
do in Chap. III.) one point which becomes prominent
in the course of Chap. II. After these matters have been
treated, the next important step to take in the process of
verification of the hypothesis will be to ask whether it
accords with what we know concerning the physical basis of
pleasure-pain, with the hope that the examination may help
us to gain some knowledge of this physical basis which,
under this theory, we should expect to find in some condi-
tions or modes of activity relating to the whole of the nerve-
tissue, whose action apparently forms the basis of all mental
life. This discussion will be undertaken in Chaps, IV.
and V.

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