Buthewas，further，thefiercestofthelitter。Hecouldmakealouderraspinggrowlthananyofthem。Histinyragesweremuchmoreterriblethantheirs。Itwashethatfirstlearnedthetrickofrollingafellow-cuboverwithacunningpaw-stroke。Anditwashethatfirstgrippedanothercubbytheearandpulledandtuggedandgrowledthroughjawstight-clenched。
Andcertainlyitwashethatcausedthemotherthemosttroubleinkeepingherlitterfromthemouthofthecave。
Thefascinationofthelightforthegraycubincreasedfromdaytoday。
Hewasperpetuallydepartingonyard-longadventurestowardthecave\'sentrance，andasperpetuallybeingdrivenback。Onlyhedidnotknowitforanentrance。Hedidnotknowanythingaboutentrances——passageswherebyonegoesfromoneplacetoanotherplace。Hedidnotknowanyotherplace，muchlessofawaytogetthere。Sotohimtheentranceofthecavewasawall——awalloflight。Asthesunwastotheoutsidedweller，thiswallwastohimthesunofhisworld。Itattractedhimasacandleattractsamoth。Hewasalwaysstrivingtoattainit。Thelifethatwassoswiftlyexpandingwithinhim，urgedhimcontinuallytowardthewalloflight。Thelifethatwaswithinhimknewthatitwastheonewayout，thewayhewaspredestinedtotread。Buthehimselfdidnotknowanythingaboutit。Hedidnotknowtherewasanyoutsideatall。
Therewasonestrangethingaboutthiswalloflight。Hisfatherhehadalreadycometorecognizehisfatherastheoneotherdwellerintheworld，acreaturelikehismother，whosleptnearthelightandwasabringerofmeat——hisfatherhadawayofwalkingrightintothewhitefarwallanddisappearing。Thegraycubcouldnotunderstandthis。Thoughneverpermittedbyhismothertoapproachthatwall，hehadapproachedtheotherwalls，andencounteredhardobstructionontheendofhistendernose。