第 18 节
作者:猜火车      更新:2021-02-20 17:38      字数:9322
  not   on   your   Perimeter;   but   on   your   side;   that   is;   on   what   you   would
  probably call your inside; but we in Spaceland should call it your side。
  I。 An eye in my inside! An eye in my stomach! Your Lordship jests。
  Stranger。 I am in no jesting humour。 I tell you that I come from Space;
  or;   since   you   will   not   understand   what   Space   means;   from   the   Land   of
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  Three   Dimensions   whence   I   but   lately   looked   down   upon   your   Plane
  which     you    call  Space     forsooth。    From    that   position    of  advantage      I
  discerned all that you speak of as SOLID (by which you mean 〃enclosed
  on four   sides〃);  your   houses;  your churches;  your   very  chests   and safes;
  yes   even   your   insides   and   stomachs;   all   lying   open   and   exposed   to   my
  view。
  I。 Such assertions are easily made; my Lord。
  Stranger。 But not easily proved; you mean。 But I mean to prove mine。
  When I descended here; I saw your four Sons; the Pentagons; each in
  his    apartment;    and    your   two    Grandsons      the   Hexagons;      I  saw   your
  youngest Hexagon remain   a while   with you and then retire to his   room;
  leaving you and your Wife alone。 I saw your Isosceles servants; three in
  number; in the kitchen at supper; and the little Page in the scullery。 Then I
  came here; and how do you think I came?
  I。 Through the roof; I suppose。
  Strange。 Not so。 Your roof; as you know very well; has been recently
  repaired; and has no aperture by which even a Woman could penetrate。 I
  tell you I come from Space。 Are you not convinced by what I have told
  you of your children and household?
  I。 Your Lordship must be aware that such facts touching the belongings
  of   his  humble   servant     might   be    easily   ascertained    by   any   one   of  the
  neighbourhood possessing your Lordship's ample means of information。
  Stranger。 (TO HIMSELF。) What must I do? Stay; one more argument
  suggests   itself    to  me。   When     you   see   a  Straight  Line   your    wife;  for
  examplehow many Dimensions do you attribute to her?
  I。 Your Lordship would treat me as if I were one of the vulgar who;
  being ignorant of Mathematics; suppose that a Woman is really a Straight
  Line; and only of One Dimension。 No; no; my Lord; we Squares are better
  advised;   and   are   as   well   aware   of   your   Lordship   that   a  Woman;   though
  popularly  called   a   Straight   Line;   is;   really   and   scientifically;   a   very   thin
  Parallelogram; possessing Two Dimensions; like the rest of us; viz。; length
  and breadth (or thickness)。
  Stranger。     But   the  very   fact   that  a  Line   is  visible   implies    that  it
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  possesses yet another Dimension。
  I。 My Lord; I have just acknowledged that a Woman is broad as well as
  long。 We see her length; we infer her breadth; which; though very slight; is
  capable of measurement。
  Stranger。   You   do   not   understand   me。   I   mean   that   when   you   see   a
  Woman; you oughtbesides inferring her breadthto see her length; and to
  SEE      what    we    call   her   HEIGHT;        although     the   last   Dimension      is
  infinitesimal in your country。 If a Line were mere length without 〃height;〃
  it would cease to occupy Space and would become invisible。 Surely you
  must recognize this?
  I。   I   must   indeed   confess   that   I   do   not   in   the   least   understand   your
  Lordship。      When      we    in   Flatland     see   a   Line;   we    see    length    and
  BRIGHTNESS。 If the brightness disappears; the Line is extinguished; and;
  as   you    say;  ceases    to  occupy    Space。    But   am    I  to  suppose    that   your
  Lordship gives the brightness the title of a Dimension; and that what we
  call 〃bright〃 you call 〃high〃?
  Stranger。 No; indeed。 By 〃height〃 I mean a Dimension like your length:
  only;    with   you;   〃height〃    is  not  so   easily   perceptible;    being   extremely
  small。
  I。 My Lord; your assertion is easily put to the test。 You say I have a
  Third     Dimension;      which     you   call  〃height。〃    Now;     Dimension      implies
  direction     and   measurement。       Do    but   measure     my    〃height;〃   or   merely
  indicate   to   me   the   direction   in   which   my   〃height〃   extends;   and   I   will
  become   your   convert。   Otherwise;   your   Lordship's   own   understand   must
  hold me excused。
  Stranger。 (TO HIMSELF。) I can do neither。 How shall I convince him?
  Surely a plain statement of facts followed by ocular demonstration ought
  to suffice。 Now; Sir; listen to me。
  You   are   living   on   a   Plane。   What   you   style   Flatland   is   the   vast   level
  surface of what I may call a fluid; or in; the top of which you and your
  countrymen move about; without rising above or falling below it。
  I am not a plane Figure; but a Solid。 You call me a Circle; but in reality
  I am not a Circle; but an infinite number of Circles; of size varying from a
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  Point to a Circle of thirteen inches in diameter; one placed on the top of
  the other。 When I cut through your plane   as I am now doing; I make   in
  your plane aSECTION which you; very rightly; call a Circle。 For even a
  Spherewhich   is   my   proper   name   in   my   own   countryif   he   manifest
  himself at all to an inhabitant of Flatland must needs manifest himself as
  a Circle。
  Do you not rememberfor I; who see all things; discerned last night
  the phantasmal   vision   of   Lineland   written   upon   your   brain   do   you   not
  remember; I say; how when you entered the realm of Lineland; you were
  compelled to manifest yourself to the King; not as a Square; but as a Line;
  because   that   Linear   Realm   had   not   Dimensions   enough   to   represent   the
  whole of you; but only a slice orSECTION of you? In precisely the same
  way; your country of Two Dimensions is not spacious enough to represent
  me;   a   being   of   Three;   but   can   only   exhibit   a   slice   orSECTION   of   me;
  which is what you call a Circle。
  The diminished brightness of your eye indicates incredulity。 But now
  prepare to receive proof positive of the truth of my assertions。 You cannot
  indeed see more than one of mySECTIONs; or Circles; at a time; for you
  have no power to raise your eye out of the plane of Flatland; but you can
  at least see that; as I rise in Space; so mySECTIONs become smaller。 See
  now; I will rise; and the effect upon your eye will be that my Circle will
  become smaller and smaller till it dwindles to a point and finally vanishes。
  There was no 〃rising〃 that I could see; but he diminished and finally
  vanished。 I winked once or twice to make sure that I was not dreaming。
  But it was no dream。 For from the depths of nowhere came forth a hollow
  voiceclose to my heart it seemed 〃Am I quite gone? Are you convinced
  now?   Well;   now   I   will   gradually   return   to   Flatland   and   you   shall   see
  mySECTION become larger and larger。〃
  Every reader in Spaceland will easily understand that my  mysterious
  Guest was speaking the language of truth and even of simplicity。 But to
  me; proficient though I was in Flatland Mathematics; it was by no means a
  simple matter。 The rough diagram given above will make it clear to any
  Spaceland child that the Sphere; ascending in the three positions indicated
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  there; must needs have manifested himself to me; or to any Flatlander; as a
  Circle;   at   first   of   full   size;   then  small;   and   at   last   very   small   indeed;
  approaching to a Point。 But to me; although I saw the facts before me; the
  causes   were   as   dark   as   ever。 All   that   I   could   comprehend   was;   that   the
  Circle   had   made   himself   smaller   and   vanished;  and   that he   had now   re…
  appeared and was rapidly making himself larger。
  When   he   regained   his   original   size;   he   heaved   a   deep   sigh;   for   he
  perceived by my silence that I had altogether failed to comprehend him。
  And indeed I was now inclining to the belief that he must be no Circle at
  all;   but   some   extremely   clever   juggler;   or   else   that   the   old   wives'   tales
  were   true;   and   that   after   all   there   were   such   people   as   Enchanter