Which　come　from　objects　are　the　sole　that　flit；
  Others　indeed　there　be　of　own　accord
  Begot；　self…formed　in　earth's　aery　skies；
  Which；　moulded　to　innumerable　shapes；
  Are　borne　aloft；　and；　fluid　as　they　are；
  Cease　not　to　change　appearance　and　to　turn
  Into　new　outlines　of　all　sorts　of　forms；
  As　we　behold　the　clouds　grow　thick　on　high
  And　smirch　the　serene　vision　of　the　world；
  Stroking　the　air　with　motions。　For　oft　are　seen
  The　giants'　faces　flying　far　along
  And　trailing　a　spread　of　shadow；　and　at　times
  The　mighty　mountains　and　mountain…sundered　rocks
  Going　before　and　crossing　on　the　sun；
  Whereafter　a　monstrous　beast　dragging　amain
  And　leading　in　the　other　thunderheads。
  Now　＇hear＇　how　easy　and　how　swift　they　be
  Engendered；　and　perpetually　flow　off
  From　things　and　gliding　pass　away。。。。
  。　　　　　。　　　　　。　　　　　。　　　　　。　　　　　。
  For　ever　every　outside　streams　away
  From　off　all　objects；　since　discharge　they　may；
  And　when　this　outside　reaches　other　things；
  As　chiefly　glass；　it　passes　through；　but　where
  It　reaches　the　rough　rocks　or　stuff　of　wood；
  There　'tis　so　rent　that　it　cannot　give　back
  An　image。　But　when　gleaming　objects　dense；
  As　chiefly　mirrors；　have　been　set　before　it；
  Nothing　of　this　sort　happens。　For　it　can't
  Go；　as　through　glass；　nor　yet　be　rent…　its　safety；
  By　virtue　of　that　smoothness；　being　sure。
  'Tis　therefore　that　from　them　the　images
  Stream　back　to　us；　and　howso　suddenly
  Thou　place；　at　any　instant；　anything
  Before　a　mirror；　there　an　image　shows；
  Proving　that　ever　from　a　body's　surface
  Flow　off　thin　textures　and　thin　shapes　of　things。
  Thus　many　images　in　little　time
  Are　gendered；　so　their　origin　is　named
  Rightly　a　speedy。　And　even　as　the　sun
  Must　send　below；　in　little　time；　to　earth
  So　many　beams　to　keep　all　things　so　full
  Of　light　incessant；　thus；　on　grounds　the　same；
  From　things　there　must　be　borne；　in　many　modes；
  To　every　quarter　round；　upon　the　moment；
  The　many　images　of　things；　because
  Unto　whatever　face　of　things　we　turn
  The　mirror；　things　of　form　and　hue　the　same
  Respond。　Besides；　though　but　a　moment　since
  Serenest　was　the　weather　of　the　sky；
  So　fiercely　sudden　is　it　foully　thick
  That　ye　might　think　that　round　about　all　murk
  Had　parted　forth　from　Acheron　and　filled
  The　mighty　vaults　of　sky…　so　grievously；
  As　gathers　thus　the　storm…clouds'　gruesome　night；
  Do　faces　of　black　horror　hang　on　high…
  Of　which　how　small　a　part　an　image　is
  There's　none　to　tell　or　reckon　out　in　words。
  Now　come；　with　what　swift　motion　they　are　borne；
  These　images；　and　what　the　speed　assigned
  To　them　across　the　breezes　swimming　on…
  So　that　o'er　lengths　of　space　a　little　hour
  Alone　is　wasted；　toward　whatever　region
  Each　with　its　divers　impulse　tends…　I'll　tell
  In　verses　sweeter　than　they　many　are；
  Even　as　the　swan's　slight　note　is　better　far
  Than　that　dispersed　clamour　of　the　cranes
  Among　the　southwind's　aery　clouds。　And　first；
  One　oft　may　see　that　objects　which　are　light
  And　made　of　tiny　bodies　are　the　swift；
  In　which　class　is　the　sun's　light　and　his　heat；
  Since　made　from　small　primordial　elements
  Which；　as　it　were；　are　forward　knocked　along
  And　through　the　interspaces　of　the　air
  To　pass　delay　not；　urged　by　blows　behind；
  For　light　by　light　is　instantly　supplied
  And　gleam　by　following　gleam　is　spurred　and　driven。
  Thus　likewise　must　the　images　have　power
  Through　unimaginable　space　to　speed
  Within　a　point　of　time；…　first；　since　a　cause
  Exceeding　small　there　is；　which　at　their　back
  Far　forward　drives　them　and　propels；　where；　too；
  They're　carried　with　such　winged　lightness　on；
  And；　secondly；　since　furnished；　when　sent　off；
  With　texture　of　such　rareness　that　they　can
  Through　objects　whatsoever　penetrate
  And　ooze；　as　'twere；　through　intervening　air。
  Besides；　if　those　fine　particles　of　things
  Which　from　so　deep　within　are　sent　abroad；
  As　light　and　heat　of　sun；　are　seen　to　glide
  And　spread　themselves　through　all　the　space　of　heaven
  Upon　one　instant　of　the　day；　and　fly
  O'er　sea　and　lands　and　flood　the　heaven；　what　then
  Of　those　which　on　the　outside　stand　prepared；
  When　they're　hurled　off　with　not　a　thing　to　check
  Their　going　out？　Dost　thou　not　see　indeed
  How　swifter　and　how　farther　must　they　go
  And　speed　through　manifold　the　length　of　space
  In　time　the　same　that　from　the　sun　the　rays
  O'erspread　the　heaven？　This　also　seems　to　be
  Example　chief　and　true　with　what　swift　speed
  The　images　of　things　are　borne　about：
  That　soon　as　ever　under　open　skies
  Is　spread　the　shining　water；　all　at　once；
  If　stars　be　out　in　heaven；　upgleam　from　earth；
  Serene　and　radiant　in　the　water　there；
  The　constellations　of　the　universe…
  Now　seest　thou　not　in　what　a　point　of　time
  An　image　from　the　shores　of　ether　falls
  Unto　the　shores　of　earth？　Wherefore；　again；
  And　yet　again；　'tis　needful　to　confess
  With　wondrous。。。
  。　　　　　。　　　　　。　　　　　。　　　　　。　　　　　。
  THE　SENSES　AND　MENTAL　PICTURES
  Bodies　that　strike　the　eyes；　awaking　sight。
  From　certain　things　flow　odours　evermore；
  As　cold　from　rivers；　heat　from　sun；　and　spray
  From　waves　of　ocean；　eater…out　of　walls
  Around　the　coasts。　Nor　ever　cease　to　flit
  The　varied　voices；　sounds　athrough　the　air。
  Then　too　there　comes　into　the　mouth　at　times
  The　wet　of　a　salt　taste；　when　by　the　sea
  We　roam　about；　and　so；　whene'er　we　watch
  The　wormword　being　mixed；　its　bitter　stings。
  To　such　degree　from　all　things　is　each　thing
  Borne　streamingly　along；　and　sent　about
  To　every　region　round；　and　nature　grants
  Nor　rest　nor　respite　of　the　onward　flow；
  Since　'tis　incessantly　we　feeling　have；
  And　all　the　time　are　suffered　to　descry
  And　smell　all　things　at　hand；　and　hear　them　sound。
  Besides；　since　shape　examined　by　our　hands
  Within　the　dark　is　known　to　be　the　same
  As　that　by　eyes　perceived　within　the　light
  And　lustrous　day；　both　touch　and　sight　must　be
  By　one　like　cause　aroused。　So；　if　we　test
  A　square　and　get　its　stimulus　on　us
  Within　the　dark；　within　the　light　what　square
  Can　fall　upon　our　sight；　except　a　square
  That　images　the　things？　Wherefore　it　seems
  The　source　of　seeing　is　in　images；
  Nor　without　these　can　anything　be　viewed。
  Now　these　same　films　I　name　are　borne　about
  And　tossed　and　scattered　into　regions　all。
  But　since　we　do　perceive　alone　through　eyes；
  It　follows　hence　that　whitherso　we　turn
  Our　sight；　all　things　do　strike　against　it　there
  With　form　and　hue。　And　just　how　far　from　us
  Each　thing　may　be　away；　the　image　yields
  To　us　the　power　to　see　and　chance　to　tell：
  For　when　'tis　sent；　at　once　it　shoves　ahead
  And　drives　along　the　air　that's　in　the　space
  Betwixt　it　and　our　eyes。　And　thus　this　air
  All　glides　athrough　our　eyeballs；　and；　as　'twere；
  Brushes　athrough　our　pupils　and　thuswise
  Passes　across。　Therefore　it　comes　we　see
  How　far　from　us　each　thing　may　be　away；
  And　the　more　air　there　be　that's　driven　before；
  And　too　the　longer　be　the　brushing　breeze
  Against　our　eyes；　the　farther　off　removed
  Each　thing　is　seen　to　be：　forsooth；　this　work
  With　mightily　swift　order　all　goes　on；
  So　that　upon　one　instant　we　may　see
  What　kind　the　object　and　how　far　away。
  Nor　over…marvellous　must　this　be　deemed
  In　these　affairs　that；　though　the　films　which　strike
  Upon　the　eyes　cannot　be　singly　seen；
  The　things　themselves　may　be　perceived。　For　thus
  When　the　wind　beats　upon　us　stroke　by　stroke
  And　when　the　sharp　cold　streams；　'tis　not　our　wont
  To　feel　each　private　particle　of　wind
  Or　of　that　cold；　but　rather　all　at　once；
  And　so　we　see　how　blows　affect　our　body；
  As　if　one　thing　were　beating　on　the　same
  And　giving　us　the　feel　of　its　own　body
  Outside　of　us。　Again；　whene'er　we　thump
  With　finger…tip　upon　a　stone；　we　touch
  But　the　rock's　surface　and　the　outer　hue；
  Nor　feel　that　hue　by　contact…　rather　feel
  The　very　hardness　deep　within　the　rock。
  Now　come；　and　why　beyond　a　looking…glass
  An　image　may　be　seen；　perceive。　For　seen
  It　soothly　is；　removed　far　within。
  'Tis　the　same　sort　as　objects　peered　upon
  Outside　in　their　true　shape；　whene'er　a　door
  Yields　through　itself　an　open　peering…place；
  And　lets　us　see　so　many　things　outside
  Beyond　the　house。　Also　that　sight　is　made
  By　a　twofold　twin　air：　for　first　is　seen
  The　air　inside　the　door…posts；　next　the　doors；
  The　twain　to　left　and　right；　and　afterwards
  A　light　beyond　comes　brushing　through　our　eyes；
  Then　other　air；　then　objects　peered　upon
  Outside　in　their　true　shape。　And　thus；　when　first
  The　image　of　the　glass　projects　itself；
  As　to　our　gaze　it　comes；　it　shoves　ahead
  And　drives　along　the　air　that's　in　the　space
  Betwixt　it　and　our　eyes；　and　brings　to　pass
  That　we　perceive　the　air　ere　yet　the　glass。
  But　when　we've　also　seen　the　glass　itself；
  Forthwith　that　image　which　from　us　is　borne
  Reaches　the　glass；　and　there　thrown　back　again
  Comes　back　unto　our　eyes；　and　driving　rolls
  Ahead　of　itself　another　air；　that　then
  'Tis　this　we　see　before　itself；　and　thus
  It　looks　so　far　removed　behind　the　glass。
  Wherefore　again；　again；　there's　naught　for　wonder
  。　　　　　。　　　　　。　　　　　。　　　　　。　　　　　。
  In　those　which　render　from　the　mirror's　plane
  A　vision　back；　since　each　thing　comes　to　pass
  By　means　of　the　two　airs。　Now；　in　the　glass
  The　right　part　of　our　members　is　observed
  Upon　the　left；　because；　when　comes　the　image
  Hitting　against　the　level　of　the　glass；
  '