Butagain，ifthesejudgmentsarenotclearanddefinite，stilllessaretheyconsistent。Idonotnowmeanthatoneman’sestimateofthevalueofanykindofpleasuresdiffersfromanother’s:
forwehaveassumedeachsentientindividualtobethefinaljudgeofthepleasantnessandpainfulnessofhisownfeelings，andthereforethiskindofdiscrepancydoesnotaffectthevalidityofthejudgments，andcreatesnodifficultyuntilanyonetriestoappropriatetheexperienceofothers，ButImeanthateachindividual’sjudgmentofthecomparativevalueofhisownpleasuresisapttobedifferentatdifferenttimes，thoughitrelatestothesamepastexperiences；andthatthisvariationisalegitimategroundfordistrustingthevalidityofanyparticularcomparison。
Thecausesofthisvariationseemtobepartlyduetothenatureoftherepresentedfeeling，andpartlytothegeneralstateofthemindatthetimeofmakingtherepresentation。Tobeginwiththeformer:wefindthatdifferentkindsofpastpleasuresandpainsdonotequallyadmitofbeingrevivedinimagination。Thus，generallyspeaking，ourmoreemotionalandmorerepresentativepainsaremoreeasilyrevivedthanthemoresensationalandpresentative:forexample，itisatthismomentmuchmoreeasyformetoimaginethediscomfortofexpectancywhichprecededapastsea-sicknessthanthepainoftheactualnausea:althoughIinfer——fromtherecollectionofjudgmentspassedatthetime——thattheformerpainwastriflingcomparedwiththelatter。Tothiscauseitseemsduethatpasthardships，toils，andanxietiesoftenappearpleasurablewhenwelookbackuponthem，aftersomeinterval；fortheexcitement，theheightenedsenseoflifethataccompaniedthepainfulstruggle，wouldhavebeenpleasurableiftakenbyitself；anditisthisthatwerecallratherthanthepain。Inestimatingpleasurestheothercauseofvariationismoreconspicuous；weareconsciousofchangesoccasionalorperiodicinourestimateofthem，dependinguponchangesinourmentalorbodilycondition。E。g。itisamatterofcommonremarkwithrespecttothegratificationsofappetitethatwecannotestimatethemadequatelyinthestateofsatiety，andthatweareapttoexaggeratetheminthestateofdesire。Idonotdenythatintensityofantecedentdesireintensifiesthepleasureoffruition；
sothatthispleasurenotonlyappears，asPlatothought，butactuallyisgreaterowingtothestrengthofthedesirethathaspreceded。Stillitisamatterofcommonexperiencethatpleasureswhichhavebeenintenselydesiredareoftenfoundtodisappointexpectation。
Thereseemtobenospecialstatesofaversion，determinedbybodilycauses，andrelatedtocertainpainsasourappetitestotheircorrespondentpleasures；butmostpersonsareliabletobethrownbytheprospectofcertainpainsintothestateofpassionateaversionwhichwecallfear，andtobetherebyledtoestimatesuchpainsasworsethantheywouldbejudgedtobeinacalmermood。