What，then，istheconductwhichPurityforbidsfortheprincipleismoreeasilydiscussedinitsnegativeaspect？Asthenormalandobviousendofsexualintercourseisthepropagationofthespecies，somehavethoughtthatallindulgenceofappetite，exceptasameanstothisend，shouldbeprohibited。ButthisdoctrinewouldleadtoarestrictionofconjugalintercoursefartoosevereforCommonSense。Shallwesay，then，thatPurityforbidssuchindulgenceexceptundertheconditionsofconjugaluniondefinedbyLaw？Butthisanswer，again，furtherreflectionshowstobeunsatisfactory。For，first，weshouldnot，onconsideration，callaconjugalunionimpure，merelybecausethepartieshadwilfullyomittedtofulfillegalconditions，andhadmadeacontractwhichthelawdeclinedtoenforce。Wemightcondemntheirconduct，butweshouldnotapplytoitthisnotion。And，secondly，wefeelthatpositivelawmaybeunfavourabletoPurity，andthatinfactPurity，likeJustice，issomethingwhichthelawoughttomaintain，butdoesnotalways。Wehavetoask，then，whatkindofsexualrelationswearetocallessentiallyimpure，whethercountenancedornotbyLawandCustom？Thereappeartobenodistinctprinciples，havinganyclaimtoself-evidence，uponwhichthequestioncanbeansweredsoastocommandgeneralassent。Itwouldbedifficulteventostatesuchaprinciplefordeterminingthedegreeofconsanguinitybetweenhusbandandwifewhichconstitutesaunionincestuous；althoughtheaversionwithwhichsuchunionsarecommonlyregardedisapeculiarlyintensemoralsentiment；andthedifficultybecomesindefinitelygreaterwhenweconsidertherationaleofprohibiteddegreesofaffinity。Again，probablyfewwouldstigmatisealegalpolygynousconnexionasimpure，howevertheymightdisapproveofthelawandofthestateofsocietyinwhichsuchalawwasestablished:
　　butiflegalPolygynyisnotimpure，isPolyandry，whenlegalandcustomary——asisnotunfrequentlythecaseamongthelowerracesofman——tobesocharacterised？
　　andifnot，onwhatrationalprinciplecanthenotionbeappliedtoinstitutionsandconduct？Again，wheredivorcebymutualconsent，withsubsequentmarriage，islegalised，wedonotcallthisanoffenceagainstPurity:andyetiftheprincipleoffreechangebeonceadmitted，itseemsparadoxicaltodistinguishpurityfromimpuritymerelybylessrapidityoftransition；
　　andtocondemnasimpureeven`FreeLove’，insofarasitisearnestlyadvocatedasameanstoacompleterharmonyofsentimentbetweenmenandwomen，andnottomeresensuallicense。
　　Shallwe，then，fallbackuponthepresenceofmutualaffectionasdistinguishedfrommereappetiteasconstitutingtheessenceofpuresexualrelations？Butthis，again，whiletoolaxfromonepointofview，seemsfromanothertoosevereforCommonSense:aswedonotcondemnmarriageswithoutaffectionasimpure，althoughwedisapproveofthemasproductiveofunhappiness。Suchmarriages，indeed，aresometimesstigmatisedas``legalisedprostitution’’，butthephraseisfelttobeextravagantandparadoxical；anditisevendoubtfulwhetherwedodisapproveofthemunderallcircumstances；ase。g。inthecaseofroyalalliances。
　　Again，howshallwejudgeofsuchinstitutionsasthoseofPlato’sCommonwealth，establishingcommunityofwomenandchildren，butatthesametimeregulatingsexualindulgencewiththestrictestreferencetosocialends？Ourhabitualstandardsseeminapplicabletosuchnovelcircumstances。
　　Thetruthseemstobe，thatreflectiononthecurrentsexualmoralitydiscoverstoustwodistinctgroundsforit:firstandchiefly，themaintenanceofacertainsocialorder，believedtobemostconducivetotheprosperouscontinuanceofthehumanrace:and，secondly，theprotectionofhabitsoffeelinginindividualsbelievedtobegenerallymostimportanttotheirperfectionortheirhappiness。Wecommonlyconceivethatboththeseendsaretobeattainedbythesameregulations:andinanidealstateofsocietythiswouldperhapsbethecase:butinactuallifethereisfrequentlyapartialseparationandincompatibilitybetweenthem。Butfurther，iftherepressionofsexuallicenseisprescribedmerelyasameanstotheseends，itdoesnotseemthatwecanaffirmasself-evidentthatitisalwaysanecessarymeansineithercase:onthecontrary，itseemsclearthatsuchanaffirmationwouldbeunreliableapartfromempiricalconfirmation。Wecannotreasonablybesure，withoutinductionfromsociologicalobservations，thatacertainamountofsexuallicensewillbeincompatiblewiththemaintenanceofpopulationinsufficientnumbersandgoodcondition。
　　Andifweconsiderthematterinitsrelationtotheindividual’sperfection，itiscertainlyclearthathemissesthehighestandbestdevelopmentofhisemotionalnature，ifhissexualrelationsareofamerelysensualkind:
　　butwecanhardlyknowapriorithatthislowerkindofrelationinterfereswiththedevelopmentofthehighernorindeeddoesexperienceseemtoshowthatthisisuniversallythecase。Andthislatterlineofargumenthasafurtherdifficulty。Forthecommonopinionthatwehavetojustifydoesnotmerelycondemnthelowerkindofdevelopmentincomparisonwiththehigher，butincomparisonwithnoneatall。Sincewedonotpositivelyblameamanforremainingcelibatethoughweperhapsdespisehimsomewhatunlessthecelibacyisadoptedasameanstoanobleend:itisdifficulttoshowwhyweshouldcondemn——initsbearingontheindividual’semotionalperfectionsolely——theimperfectdevelopmentaffordedbymerelysensualrelations。
　　MuchmoremightbesaidtoexhibittheperplexitiesinwhichtheattempttodefinetheruleofPurityorChastityinvolvesus。ButIdonotdesiretoextendthediscussionbeyondwhatisnecessaryforthecompletionofmyargument。Itseemstomethattheconclusionannouncedin§；2ofthischapterhasnowbeensufficientlyjustified。Wehaveexaminedthemoralnotionsthatpresentthemselveswithaprimafacieclaimtofurnishindependentandself-evidentrulesofmorality:andwehaveineachcasefoundthatfromsuchregulationofconductastheCommonSenseofmankindreallysupports，nopropositioncanbeelicitedwhich，whenfairlycontemplated，evenappearstohavethecharacteristicofascientificaxiom。ItisthereforescarcelyneedfultoproceedtoasystematicexaminationofthemannerinwhichCommonSenseprovidesfortheco-ordinationoftheseprinciples。Infact，thisquestionseemstohavebeenalreadydiscussedasfarasisprofitable:fortheattempttodefineeachprinciplesinglyhasinevitablyledustoconsidertheirmutualrelations:anditwasinthecaseswheretwomoralprinciplescameintocollisionthatwemostclearlysawthevaguenessandinconsistencywithwhichtheboundariesofeacharedeterminedbyCommonSense。Forexample，thedistinctionbetweenperfectlystringentmoralobligations，andsuchlaxerdutiesasmaybemodifiedbyaman’sownact，isoftentaken:anditisonewhich，aswesaw，iscertainlyrequiredinformulatingtheCommon-Senseviewoftheeffectofapromiseincreatingnewobligations:butitisonewhichwecannotapplywithanypracticalprecision，becauseofthehighdegreeofindeterminatenesswhichwefindinthecommonnotionsofdutiestowhichthehighestdegreeofstringencyisyetcommonlyattributed。
　　Itonlyremainstoguardmyargumentfrombeingunderstoodinamoresweepingsensethanithasbeenintendedorisproperlyabletobear。NothingthatIhavesaideventendstoshowthatwehavenotdistinctmoralimpulses，claimingauthorityoverallothers，andprescribing，orforbiddingkindsofconductastowhichthereisaroughgeneralagreement，atleastamongeducatedpersonsofthesameageandcountry。Itisonlymaintainedthattheobjectsoftheseimpulsesdonotadmitofbeingscientificallydeterminedbyanyreflectiveanalysisofcommonsense。ThenotionsofBenevolence，Justice，GoodFaith，Veracity，Purity，etc。，arenotnecessarilyemptiedofsignificanceforus，becausewehavefounditimpossibletodefinethemwithprecision。
　　Themainpartoftheconductprescribedundereachnotionissufficientlyclear:andthegeneralruleprescribingitdoesnotnecessarilyloseitsforcebecausethereisineachcaseamarginofconductinvolvedinobscurityandperplexity，orbecausetheruledoesnotonexaminationappeartobeabsoluteandindependent。Inshort，theMoralityofCommonSensemaystillbeperfectlyadequatetogivepracticalguidancetocommonpeopleincommoncircumstances:buttheattempttoelevateitintoasystemofIntuitionalEthicsbringsitsinevitableimperfectionsintoprominencewithouthelpingustoremovethem。
　　InthefirstchapterofthisthirdBookI
　　wascarefultopointoutthatmotives，aswellasintentions，formpartofthesubject-matterofourcommonmoraljudgments:andindeedinournotionof`conscientiousness’thehabitofreflectingonmotives，andjudgingthemtobegoodorbad，isaprominentelement。Itisnecessary，therefore，inordertocompleteourexaminationoftheIntuitionalMethod，toconsiderthiscomparisonofmotives，andascertainhowfaritcanbemadesystematic，andpursuedtoconclusionsofscientificvalue。Andthisseemsaconvenientplacefortreating，ofthispartofthesubject:sinceithasbeenmaintainedbyanimportantschoolofEnglishmoraliststhatDesiresandAffectionsratherthanActsarethepropersubjectsoftheethicaljudgment:anditisnaturaltofallbackuponthisviewwhensystematicreflectiononthemoralityofCommonSensehasshownusthedifficultyofobtainingapreciseandsatisfactorydeterminationofrightnessandwrongnessinexternalconduct。
　　Toavoidconfusion，itshouldbeobservedthattheterm`motive’iscommonlyusedintwoways。Itissometimesappliedtothoseamongtheforeseenconsequencesofanyactwhichtheagentdesiredinwilling:andsometimestothedesire，orconsciousimpulseitself。Thetwomeaningsareinamannercorrespondent，as，whereimpulsesaredifferent，theremustalwaysbesomesortofdifferenceintheirrespectiveobjects。Butforourpresentpurposeitismoreconvenienttotakethelattermeaning:asitisourownimpulsivenaturethatwehavepracticallytodealwith，inthewayofcontrolling，resisting，indulgingthedifferentimpulses；andthereforeitistheethicalvalueofthesethatweareprimarilyconcernedtoestimate:andweoftenfindthattwoimpulses，whichwouldbeplacedveryfarapartinanypsychologicallist，aredirectedtowardsanendmateriallyidentical，thoughregardedfromadifferentpointofviewineachcase。Ase。g。bothappetiteandRationalself-lovemayimpelamantoseekaparticularsensualgratification；
　　thoughinthelattercaseitisregardedunderthegeneralnotionofpleasure，andasformingpartofasumcalledHappiness。Inthischapter，then，I
　　shallusethetermMotivetodenotethedesiresofparticularresults，believedtobeattainableasconsequencesofourvoluntaryacts，bywhichdesireswearestimulatedtowillthoseacts。[1]
　　Thefirstpointtonoticeinconsideringtheethicalresultofacomprehensivecomparisonofmotivesis，thattheissueinanyinternalconflictisnotusuallythoughttobebetweenpositivelygoodandbad，butbetweenbetterandlessgood，moreorlessestimableorelevatedmotives。Theonlykindofmotivewhichifanywecommonlyjudgetobeintrinsicallybad，apartfromthecircumstancesunderwhichitoperates，ismalevolentaffection；thatis，thedesire，howeveraroused，toinflictpainorharmonsomeothersentientbeing。Andreflectionshowsaswesawinchap。viii。ofthisBookthatCommonSensedoesnotpronounceeventhiskindofimpulseabsolutelybad:sincewecommonlyrecognisetheexistenceof`legitimateresentment’and`righteousindignation’；andthoughmoraliststrytodistinguishbetweenangerdirected`againsttheact’and`againsttheagent’，andbetweentheimpulsetoinflictpainandthedesireoftheantipatheticpleasurethattheagentwillreapfromthisinfliction，itmaybefairlydoubtedwhetheritiswithinthecapacityofordinaryhumannaturetomaintainthesedistinctionsinpractice。AtanyratethereisnoothermotiveexceptdeliberatemalevolencewhichCommonSensecondemnsasabsolutelybad。Theothermotivesthatarecommonlyspokenofin`dyslogistic’
　　termsseemtobemostproperlycalledinBentham’slanguage’Seductive’
　　ratherthanbad。Thatis，theyprompttoforbiddenconductwithconspicuousforceandfrequency:butwhenweconsiderthemcarefullywefindthattherearecertainlimits，howevernarrow，withinwhichtheiroperationislegitimate。
　　Thequestion，then，ishowfartheintuitiveknowledgethatourcommonjudgmentsseemtoimplyoftherelativegoodnessofdifferentkindsofmotivesisfoundonreflectiontosatisfytheconditionslaiddownintheprecedingchapter。Ihavebeforearguedthatitisincorrecttoregardthiscomparisonofmotivesasthenormalformofourcommonmoraljudgments，nordoIseeanygroundforholdingittobetheoriginalform。Ithinkthatinthenormaldevelopmentofman’smoralconsciousness，bothintheindividualandintherace，moraljudgmentsarefirstpassedonoutwardacts，andthatmotivesdonotcometobedefinitelyconsideredtilllater；justasexternalperceptionofphysicalobjectsprecedesintrospection。
　　Atthesametime，inmyview，itdoesnotthereforefollowthatthecomparisonofmotivesisnotthefinalandmostperfectformofthemoraljudgment。
　　Itmightapproveitselfassuchbythesystematicclearnessandmutualconsistencyoftheresultstowhichitled，whenpursuedbydifferentthinkersindependently:andbyitsfreedomfromthepuzzlesanddifficultiestowhichotherdevelopmentsoftheIntuitionalMethodseemtobeexposed。
　　Itappears，however，onexaminationthat，ontheonehand，manyifnotallofthedifficultieswhichhaveemergedintheprecedingdiscussionofthecommonlyreceivedprinciplesofconductarereproducedinadifferentformwhenwetrytoarrangeMotivesinorderofexcellence:andontheotherhand，suchaconstructionpresentsdifficultiespeculiartoitself，andtheattempttosolvetheseexhibitsgreaterandmorefundamentaldifferencesamongIntuitivemoralists，asregardsRankofMotive，thanwefoundtoexistasregardsRightnessofoutwardacts。