WhenIsawmypoorbrotherledawaytoimprisonment,IattemptedtoleapdownintotheCouncilChamber,desiringtointercedeonhisbehalf,oratleastbidhimfarewell. ButIfoundthatIhadnomotionofmyown. IabsolutelydependedonthevolitionofmyGuide,whosaidingloomytones,"Heednotthybrother;haplythoushalthaveampletimehereaftertocondolewithhim.Followme." Oncemoreweascendedintospace."Hitherto,"saidtheSphere,"IhaveshewnyounaughtsavePlaneFiguresandtheirinteriors. NowImustintroduceyoutoSolids,andrevealtoyoutheplanuponwhichtheyareconstructed. Behlodthismultitudeofmoveablesquarecards. See,Iputononanother,not,asyousupposed,Northwardoftheother,butontheother.Nowasecond,nowathird. See,IambuildingupaSolidbyamultitudeofSquaresparalleltooneanother. NowtheSolidiscomplete,beingashighasitislongandbroad,andwecallitaCube." "Pardonme,myLord,"repliedI;"buttomyeyetheappearanceisasofanIrregularFigurewhoseinsideislaidopentoview;inotherwords,methinksIseenoSolid,butaPlanesuchasweinferinFlatland;onlyofanIrregularitywhichbetokenssomemonstrouscriminal,sothattheverysightofitispainfultomyeyes." "True,"saidtheSphere;"itappearstoyouaPlane,becauseyouarenotaccustomedtolightandshadeandperspective;justasinFlatlandaHexagonwouldappearaStraightLinetoonewhohasnottheArtofSightRecognition. ButinrealityitisaSolid,asyoushalllearnbythesenseofFeeling." HethenintroducedmetotheCube,andIfoundthatthismarvellousBeingwasindeednoPlane,butaSolid;andthathewasendowedwithsixplanesidesandeightterminalpointscalledsolidangles;andIrememberedthesayingoftheSpherethatjustsuchaCreatureasthiswouldbeformedbytheSquaremoving,inSpace,paralleltohimself:andIrejoicedtothinkthatsoinsignificantaCreatureasIcouldinsomesensebecalledtheProgenitorofsoillustriousanoffspring. ButstillIcouldnotfullyunderstandthemeaningofwhatmyTeacherhadtoldmeconcerning"light"and"shade"and"perspective";andIdidnothesitatetoputmydifficultiesbeforehim. WereItogivetheSphere'sexplanationofthesematters,succinctandclearthoughitwas,itwouldbetedioustoaninhabitantofSpace,whoknowsthesethingsalready. Sufficeit,thatbyhislucidstatements,andbychangingthepositionofobjectsandlights,andbyallowingmetofeeltheseveralobjectsandevenhisownsacredPerson,heatlastmadeallthingscleartome,sothatIcouldnowreadilydistinguishbetweenaCircleandaSphere,aPlaneFigureandaSolid. ThiswastheClimax,theParadise,ofmystrangeeventfulHistory. HenceforthIhavetorelatethestoryofmymiserableFall:—mostmiserable,yetsurelymostundeserved! Forwhyshouldthethirstforknowledgebearoused,onlytobedisappointedandpunished? Myvolitionshrinksfromthepainfultaskofrecallingmyhumiliation;yet,likeasecondPrometheus,Iwillendurethisandworse,ifbyanymeansImayarouseintheinteriorsofPlaneandSolidHumanityaspiritofrebellionagainsttheConceitwhichwouldlimitourDimensionstoTwoorThreeoranynumbershortofInfinity. Awaythenwithallpersonalconsiderations! Letmecontinuetotheend,asIbegan,withoutfurtherdigressionsoranticipations,pursuingtheplainpathofdispassionateHistory. Theexactfacts,theexactwords,—andtheyareburntinuponmybrain,—shallbesetdownwithoutalterationofaniota;andletmyReadersjudgebetweenmeandDestiny. TheSpherewouldwillinglyhavecontinuedhislessonsbyindoctrinatingmeintheconformationofallregularSolids,Cylinders,Cones,Pyramids,Pentahedrons,Hexahedrons,Dodecahedrons,andSpheres:butIventuredtointerrupthim.NotthatIwasweariedofknowledge. Onthecontrary,Ithirstedforyetdeeperandfullerdraughtsthanhewasofferingtome. "Pardonme,"saidI,"OThouWhomImustnolongeraddressasthePerfectionofallBeauty;butletmebegtheetovouchsafethyservantaslightofthineinterior." I.Thineinterior:thystomach,thyintestines. Sphere.Whencethisill-timedimpertinentrequest?AndwhatmeanyoubysayingthatIamnolongerthePerfectionofallBeauty? I.MyLord,yourownwisdomhastaughtmetoaspiretoOneevenmoregreat,morebeautiful,andmorecloselyapproximatetoPerfectionthanyourself. Asyouyourself,superiortoallFlatlandforms,combinemanyCirclesinOne,sodoubtlessthereisOneaboveyouwhocombinesmanySpheresinOneSupremeExistence,surpassingeventheSolidsofSpaceland. Andevenaswe,whoarenowinSpace,lookdownonFlatlandandseetheinsidesofallthings,soofacertaintythereisyetaboveussomehigher,purerregion,whitherthoudostsurelypurposetoleadme—OThouWhomIshallalwayscall,everywhereandinallDimensions,myPriest,Philosopher,andFriend—someyetmorespaciousSpace,somemoredimensionableDimensionality,fromthevantage-groundofwhichweshalllookdowntogetherupontherevealedinsidesofSolidthings,andwherethineownintestines,andthoseofthykindredSpheres,willlieexposedtotheviewofthepoorwanderingexilefromFlatland,towhomsomuchhasalreadybeenvouchsafed. Sphere.Pooh!Stuff!Enoughofthistrifling! Thetimeisshort,andmuchremainstobedonebeforeyouarefittoproclaimtheGospelofThreeDimensionstoyourblindbenightedcountrymeninFlatland. I.Nay,graciousTeacher,denymenotwhatIknowitisinthypowertoreform. Grantmebutoneglimpseofthineinterior,andIamsatisfiedforever,remaininghenceforththydocilepupil,thyunemacipableslave,readytoreceiveallthyteachingsandtofeeduponthewordsthatfallfromthylips. Sphere.Well,then,tocontentandsilenceyou,letmesayatonce,IwouldshewyouwhatyouwishifIcould;butIcannot.Wouldyouhavemeturnmystomachinsideouttoobligeyou? I.ButmyLordhasshewnmetheintestinesofallmycountrymenintheLandofTwoDimensionsbytakingmewithhimintotheLandofThree. WhatthereforemoreeasythannowtotakehisservantonasecondjourneyintotheblessedregionoftheFourthDimension,whereIshalllookdownwithhimoncemoreuponthislandofThreeDimensions,andseetheinsideofeverythree-dimensionedhouse,thesecretsofthesolidearth,thetreasuresoftheminesofSpaceland,andtheintestinesofeverysolidlivingcreature,eventhenobleandadorableSpheres. Sphere.ButwhereisthislandofFourDimensions? I.Iknownot:butdoubtlessmyTeacherknows. Sphere.NotI.Thereisnosuchland.Theveryideaofitisutterlyinconceivable. I.Notinconceivable,myLord,tome,andthereforestilllessinconceivabletomyMaster. Nay,Idespairnotthat,evenhere,inthisregionofThreeDimensions,yourLordship'sartmaymaketheFourthDimensionvisibletome;justasintheLandofTwoDimensionsmyTeacher'sskillwouldfainhaveopenedtheeyesofhisblindservanttotheinvisiblepresenceofaThirdDimension,thoughIsawitnot. Letmerecallthepast.WasInottaughtbelowthatwhenIsawaLineandinferredaPlane,IinrealitysawaThirdunrecognizedDimension,notthesameasbrightness,called"height"? Anddoesitnotnowfollowthat,inthisregion,whenIseeaPlaneandinferaSolid,IreallyseeaFourthunrecognizedDimension,notthesameascolour,butexistent,thoughinfinitesimalandincapableofmeasurement? Andbesidesthis,thereistheArgumentfromAnalogyofFigures. Sphere.Analogy!Nonsense:whatanalogy? I.YourLordshiptemptshisservanttoseewhetherherememberstherevelationsimpartedtohim. Triflenotwithme,myLord;Icrave,Ithirst,formoreknowledge. DoubtlesswecannotseethatotherhigherSpacelandnow,becauswewehavenoeyeinourstomachs. But,justastherewastherealmofFlatland,thoughthatpoorpunyLinelandMonarchcouldneitherturntoleftnorrighttodiscernit,andjustastherewascloseathand,andtouchingmyframe,thelandofThreeDimensions,thoughI,blindsenselesswretch,hadnopowertotouchit,noeyeinmyinteriortodiscernit,soofasuretythereisaFourthDimension,whichmyLordperceivesawiththeinnereyeofthought. AndthatitmustexistmyLordhimselfhastaughtme. Orcanhehaveforgottenwhathehimselfimpartedtohisservant? InOneDimension,didnotamovingPointproduceaLinewithtwoterinalpoints? InTwoDimensions,didnotamovingLineproduceaSquarewithfourterminalpoints? InThreeDimensions,didnotamovingSquareproduce—didnotthiseyeofminebeholdit—thatblessedBeing,aCube,witheightterminalpoints? AndinFourDimensionsshallnotamovingCube—alas,forAnalogy,andalasfortheProgressofTruth,ifitbenotso—shallnot,Isay,themotionofadivineCuberesultinastillmoredivineOrganizationwithsixteenterminalpoints? BeholdtheinfallibleconfirmationoftheSeries,2,4,8,16:isnotthisaGeometricalProgression?Isnotthis—ifImightquotemyLord'sownwords—"strictlyaccordingtoAnalogy"? Again,wasInottaughtbymyLordthatasinaLinetherearetwoboundingPoints,andinaSquaretherearefourboundingLInes,soinaCubetheremustbesixboundingSquares? BeholdoncemoretheconfirmingSeries,2,4,6:isnotthisanArithemticalProgression? AndconsequentlydoesitnotofnecessityfollowthatthemoredivineoffspringofthedivineCubeintheLandofFourDimensions,musthave8boundingCubes:andisnotthisalso,asmyLordhastaughtmetobelieve,"strictlyaccordingtoAnalogy"? O,myLord,myLord,behold,Icastmyselfinfaithuponconjecture,notknowingthefacts;andIappealtoyourLordshiptoconfirmordenymylogicalanticipations. IfIamwrong,Iyield,andwillnolongerdemandaFourthDimension;but,ifIamright,myLordwilllistentoreason. Iasktherefore,isit,orisitnot,thefact,thaterenowyourcountrymenalsohavewitnessedthedescentofBeingsofahigherorderthantheirown,enteringclosedrooms,evenasyourLordshipenteredmine,withouttheopeningofdoorsorwindows,andappearingandvanishingatwill? OnthereplytothisquestionIamreaedytostakeeverything.Denyit,andIamhenceforthsilent.Onlyvouchsafeananswer. Sphere(afterapause).Itisreportedso. Butmenaredividedinopinionastothefacts. Andevengrantingthefacts,theyexplainthemindifferentways. Andinanycase,howevergreatmaybethenumberofdifferentexplanations,noonehasadoptedorsuggestedthetheoryofaFourthDimension. Therefore,prayhavedonewiththistrifling,andletusreturntobusiness. I.Iwascertainofit.Iwascertainthatmyanticipationswouldbefulfilled. Andnowhavepatiencewithmeandanswermeyetonemorequestion,bestofTeachers! Thosewhohavethusappeared—nooneknowswhence—andhavereturned—nooneknowswhither—havetheyalsocontractedtheirsectionsandvanishedsomehowintothatmoreSpaciousSpace,whitherInowentreatyoutoconductme? Sphere(moodily).Theyhavevanished,certainly—iftheyeverappeared. Butmostpeoplesaythatthesevisionsarosefromthethought—youwillnotunderstandme—fromthebrain;fromtheperturbedangularityoftheSeer. I.Saytheyso?Oh,believethemnot. Orifitindeedbeso,thatthisotherSPaceisreallyThoughtland,thentakemetothatblessedRegionwhereIinThoughtshallseetheinsidesofallsolidthings. There,beforemyravishedeye,aCubemovinginsomealtogethernewdirection,butstrictlyaccordingtoAnalogy,soastomakeeveryparticleofhisinteriorpassthroughanewkindofSpace,withawakeofitsown—shallcreateastillmoreperfectperfectionthanhimself,withsixteenterminalExtra-solidangles,andEightsolidCubesforhisPerimeter. Andoncethere,shallwestayourupwardcourse? InthatblessedregionofFourDimensions,shallwelingeratthethresholdoftheFifth,andnotentertherein?Ah,no! Letusratherresolvethatourambitionshallsoarwithourcorporalascent. Then,yieldingtoourintellectualonset,thegatesoftheSixDimensionshallflyopen;afterthataSeventh,andthenanEighth— HowlongIshouldhavecontinuedIknownot. InvaindidtheSphere,inhisvoiceofthunder,reiteratehiscommandofsilence,andthreatenmewiththedirestpenaltiesifIpersisted. Nothingcouldstemthefloodofmyecstaticaspirations. PerhapsIwastoblame;butindeedIwasintoxicatedwiththerecentdraughtsofTruthtowhichhehimselfhadintroducedme. However,theendwasnotlongincoming. Mywordswerecutshortbyacrashoutside,andasimultaneouscrashinsideme,whichimpelledmethroughspacewithavelocitythatprecludedspeech.Down!down!down! Iwasrapidlydescending;andIknewthatreturntoFlatlandwasmydoom. Oneglimpse,onelastandnever-to-be-forgottenglimpseIhadofthatdulllevelwilderness—whichwasnowtobecomemyUniverseagain—spreadoutbeforemyeye.Thenadarkness. Thenafinal,all-consummatingthunder-peal;and,whenIcametomyself,IwasoncemoreacommoncreepingSquare,inmyStudyathome,listeningtothePeace-CryofmyapproachingWife.