IfmypoorFlatlandfriendretainedthevigourofmindwhichheenjoyedwhenhebegantocomposetheseMemoirs,Ishouldnotnowneedtorepresenthiminthispreface,inwhichhedesires,fully,toreturnhisthankstohisreadersandcriticsinSpaceland,whoseappreciationhas,withunexpectedcelerity,requiredasecondeditionofthiswork;secondly,toapologizeforcertainerrorsandmisprints(forwhich,however,heisnotentirelyresponsible);and,thirdly,toexplainoneortwomisconceptions. ButheisnottheSquareheoncewas. Yearsofinprisonment,andthestillheavierburdenofgeneralincredulityandmockery,havecombinedwiththethoughtsandnotions,andmuchalsooftheterminology,whichheacquiredduringhisshortstayinspaceland. Hehas,therefore,requestedmetoreplyinhisbehalftotwospecialobjections,oneofanintellectual,theotherofamoralnature. Thefirstobjectionis,thataFlatlander,seeingaLine,seessomethingthatmustbethicktotheeyeaswellaslongtotheeye(otherwiseitwouldnotbevisible,ifithadnotsomethickness);andconsequentlyheought(itisargued)toacknowledgethathiscountrymenarenotonlylongandbroad,butalso(thoughdoubtlesstoaveryslightdegree)thickorhigh. Thisobjectionisplausible,and,toSpacelanders,almostirresistible,sothat,Iconfess,whenIfirstheardit,Iknewnotwhattoreply. Butmypooroldfriend'sanswerappearstomecompletelytomeetit. "Iadmit,"saidhe—whenImentionedtohimthisobjection—"Iadmitthetruthofyourcritic'sfacts,butIdenyhisconclusions. ItistruethatwehavereallyinFlatlandaThirdunrecognizedDimensioncalled'height,'justasitalsoistruethatyouhavereallyinSpacelandaFourthunrecognizedDimension,calledbynonameatpresent,butwhichIwillcall'extra-height.' Butwecannomoretakecognizanceofour'height'thanyoucanofyour'extra-height.' EvenI—whohavebeeninSpaceland,andhavehadtheprivilegeofunderstandingfortwenty-fourhoursthemeaningof'height'—evenIcannotnowcomprehendit,norrealizeitbythesenseofsightorbyanyprocessofreason;Icanbutapprehenditbyfaith. "Thereasonisobvious.Dimensionimplieddirection,impliesmeasurement,impliesthemoreandtheless. Now,allourlinesareequallyandinfinitesimallythick(orhigh,whicheveryoulike);consequently,thereisnothinginthemtoleadourmindstotheconceptionofthatDimension. No'delicatemicrometer'—ashasbeensuggestedbyonetoohastySpacelandcritic—wouldintheleastavailus;forweshouldnotknowwhattomeasure,norinwhatdirection. WhenweseeaLine,weseesomethingthatislongandbright;brightness,aswellaslength,isnecessarytotheexistenceofaLine;ifthebrightnessvanishes,theLineisextinguished. Hence,allmyFlatlandfriends—whenItalktothemabouttheunrecognizedDimensionwhichissomehowvisibleinaLine—say,'Ah,youmeanbrightness':andwhenIreply,'No,ImeanarealDimension,'theyatonceretort,'Thenmeasureit,ortellusinwhatdirectionitextends';andthissilencesme,forIcandoneither. Onlyyesterday,whentheChiefCircle(inotherwordsourHighPriest)cametoinspecttheStatePrisonandpaidmehisseventhannualvisit,andwhenfortheseventhtimeheputmethequestion,'WasIanybetter?' Itriedtoprovetohimthathewas'high,'aswellaslongandbroad,althoughhedidnotknowit.Butwhatwashisreply? 'YousayIam"high";measuremy"high-ness"andIwillbelieveyou.'WhatcouldIdo?HowcouldImeethischallenge? Iwascrushed;andhelefttheroomtriumphant. "Doesthisstillseemstrangetoyou?Thenputyourselfinasimilarposition. SupposeapersonoftheFourthDimension,condescendingtovisityou,weretosay,'Wheneveryouopenyoureyes,youseeaPlane(whichisofTwoDimensions)andyouinferaSolid(whichisofThree);butinrealityyoualsosee(thoughyoudonotrecognize)aFourthDimension,whichisnotcolournorbrightnessnoranythingofthekind,butatrueDimension,althoughIcannotpointouttoyouitsdirection,norcanyouposssiblymeasureit.' Whatwouldyousaytosuchavisitor?Wouldnotyouhavehimlockedup? Well,thatismyfate:anditisasnaturalforusFlatlanderstolockupaSquareforpreachingtheThirdDimension,asitisforyouSpacelanderstolockupaCubeforpreachingtheFourth. Alas,howstrongafamilylikenessrunsthroughblindandpersecutinghumanityinallDimensions! Points,Lines,Squares,Cubes,Extra-Cubes—weareallliabletothesameerrors,allaliketheSlaversofourrespectiveDimensionalprejudices,asoneofourSpacelandpoetshassaid— "OnetouchofNaturemakesallworldsakin." OnthispointthedefenceoftheSquareseemstometobeimpregnable. IwishIcouldsaythathisanswertothesecond(ormoral)objectionwasequallyclearandcogent. Ithasbeenobjectedthatheisawoman-hater;andasthisobjectionhasbeenvehementlyurgedbythosewhomNature'sdecreehasconstitutedthesomewhatlargerhalfoftheSpacelandrace,Ishouldliketoremoveit,sofarasIcanhonestlydoso. ButtheSquareissounaccustomedtotheuseofthemoralterminologyofSpacelandthatIshouldbedoinghimaninjusticeifIwereliterallytotranscribehisdefenceagainstthischarge. Acting,therefore,ashisinterpreterandsummarizer,Igatherthatinthecourseofanimprisonmentofsevenyearshehashimselfmodifiedhisownpersonalviews,bothasregardsWomenandasregardstheIsoscelesorLowerClasses. Personally,henowinclinestotheopinionoftheSphere(seepage86)thattheStraightLinesareinmanyimportantrespectssuperiortotheCircles. But,writingasaHistorian,hehasidentifiedhimself(perhapstooclosely)withtheviewsgenerallyadoptedbyFlatland,and(ashehasbeeninformed)evenbySpaceland,Historians;inwhosepages(untilveryrecenttimes)thedestiniesofWomenandofthemassesofmankindhaveseldombeendeemedworthyofmentionandneverofcarefulconsideration. InastillmoreobscurepassagehenowdesirestodisavowtheCircularoraristocratictendencieswithwhichsomecriticshavenaturallycreditedhim. WhiledoingjusticetotheintellectualpowerwithwhichafewCircleshaveformanygenerationsmaintainedtheirsupremacyoverimmensemultitudesoftheircountrymen,hebelievesthatthefactsofFlatland,speakingforthemselveswithoutcommentonhispart,declarethatRevolutionscannotalwaysbesuppressedbyslaughter,andthatNature,insentencingtheCirclestoinfecundity,hascondemnedthemtoultimatefailure—"andherein,"hesays,"IseeafulfilmentofthegreatLawofallworlds,thatwhilethewisdomofManthinksitisworkingonething,thewisdomofNatureconstrainsittoworkanother,andquiteadifferentandfarbetterthing." Fortherest,hebegshisreadersnottosupposethateveryminutedetailinthedailylifeofFlatlandmustneedscorrespondtosomeotherdetailinSpaceland;andyethehopesthat,takenasawhole,hisworkmayprovesuggestiveaswellasamusing,tothoseSpacelandersofmoderateandmodestmindswho—speakingofthatwhichisofthehighestimportance,butliesbeyondexperience—declinetosayontheonehand,"Thiscanneverbe,"andontheotherhand,"Itmustneedsbepreciselythus,andweknowallaboutit."