Résumé of the examination of pessimism-Investigation of scientific opti-
mism-The idea of the coincidence of the individual and the general
happiness in ethics and economics-Hartley's psychological basis of
optimism-The doctrine that pain is a condition of pleasure-The scien-
tific conception of progress-Need of certain preliminary enquiries—
Question of the excess of pleasure or of pain in human life-Treatment
of the question apart from the comparative frequency of the external
causes-Deficiencies in the theory of the causes of pleasure and pain-
Pleasure and pain not invariably equal in different regions of conscious
activity-Inexactness of subjective comparison of pleasure with pain in
these regions-Results attainable by such comparison important though
not adequate Comparison of amounts of pleasure in different regions
-Unsatisfactory character of this abstract method of calculation-
Resort to a biological conception of pleasure and pain of little practical
utility—Impracticability of summing the single external causes of
pleasure and pain-Also of adding together our single experiences of
pleasure and pain-Liability to error in estimating the value of single
feelings The results of an observation of others' single feelings still
less satisfactory-Life not to be measured directly in single feelings of
pleasure and pain-Modification of the problem by the substitution of
the idea of happiness for that of pleasure-Objections to such a substi-
tution as (a) a cession of the hedonist's position, and (b) an exchange
of a simple for a complex idea-Provisional answer to these objections
-Popular conception of happiness examined-Permanent conditions of
pleasure the root-idea of happiness-(4) First stage in construction
of happiness. (1) External elements. (a) Happiness as residing in
certain permanent external circumstances-Reasons of the popular
distinction between valuable objects and agreeable feelings-(B)
Happiness as consisting in permanent lines of pleasurable externally-
directed action: meaning of interests-(2) Internal elements-(a)
Internal processes of reflection as determined by regulation of external
aims: abiding internal effects of moral achievement-(8) Pleasurable
reflection as result of distinct effort to obtain an inner possession: self-
culture as ingredient of happiness-(B) Higher stage in construc-
tion: due adjustment of competing aims, external and internal-(C)
Final stage in construction: control of elements of life, as thus ar-
ranged, by attention-(1) External function of attention negative and
positive (2) Internal function of attention negative and positive:
repression of desire and cultivation of pleasurable recollections and
imaginations-How far a furtherance of others' interests involved in a
wise pursuit of individual happiness-Reciprocal advantages of friendly
relations-Large external aims of individual involve benefits to others