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of the result as being a Figure； but as a Solid。 But I will describe it to you。 Or rather not I； but Analogy。
We began with a single Point； which of course being itself a Point has only ONE terminal Point。
One Point produces a Line with TWO terminal Points。
One Line produces a Square with FOUR terminal Points。
Now you can give yourself the answer to your own question： 1； 2； 4； are evidently in Geometrical Progression。 What is the next number？
I。 Eight。
SPHERE。 Exactly。 The one Square produces a SOMETHING…WHICH… YOU…DO…NOT…AS…YET…KNOW…A…NAME…FOR…BUT…WHICH…WE…CALL…A…CUBE with EIGHT terminal Points。 Now are you convinced？
I。 And has this Creature sides； as well as angles or what you call 〃terminal Points〃？
SPHERE。 Of course； and all according to Analogy。 But； by the way； not what YOU call sides； but what WE call sides。 You would call them SOLIDS。
I。 And how many solids or sides will appertain to this Being whom I am to generate by the motion of my inside in an 〃upward〃 direction； and whom you call a Cube？
SPHERE。 How can you ask？ And you a mathematician！ The side of anything is always； if I may so say； one Dimension behind the thing。 Consequently； as there is no Dimension behind a Point； a Point has 0 sides； a Line； if I may say； has 2 sides （for the Points of a Line may be called by courtesy； its sides）； a Square has 4 sides； 0； 2； 4； what Progression do you call that？
I。 Arithmetical。
SPHERE。 And what is the next number？
I。 Six。
SPHERE。 Exactly。 Then you see you have answered your own question。 The Cube which you will generate will be bounded by six sides； that is to say； six of your insides。 You see it all now； eh？
〃Monster；〃 I shrieked； 〃be thou juggler； enchanter； dream； or devil； no more will I endure thy mockeries。 Either thou or I must perish。〃 And saying these words I precipitated myself upon him。
Section 17。 How the Sphere； having in vain tried words； resorted to deeds
It was in vain。 I brought my hardest right angle into violent collision with the Stranger； pressing on him with a force sufficient to have destroyed any ordinary Circle： but I could feel him slowly and unarrestably slipping from my contact； no edging to the right nor to the left； but moving somehow out of the world； and vanishing to nothing。 Soon there was a blank。 But still I heard the Intruder's voice。
SPHERE。 Why will you refuse to listen to reason？ I had hoped to find in you as being a man of sense and an accomplished mathematician a fit apostle for the Gospel of the Three Dimensions； which I am allowed to preach once only in a thousand years： but now I know not how to convince you。 Stay； I have it。 Deeds； and not words； shall proclaim the truth。 Listen； my friend。
I have told you I can see from my position in Space the inside of all things that you consider closed。 For example； I see in yonder cupboard near which you are standing； several of what you call boxes （but like everything else in Flatland； they have no tops nor bottoms） full of money； I see also two tablets of accounts。 I am about to descend into that cupboard and to bring you one of those tablets。 I saw you lock the cupboard half an hour ago； and I know you have the key in your possession。 But I descend from Space； the doors； you see； remain unmoved。 Now I am in the cupboard and am taking the tablet。 Now I have it。 Now I ascend with it。
I rushed to the closet and dashed the door open。 One of the tablets was gone。 With a mocking laugh； the Stranger appeared in the other corner of the room； and at the same time the tablet appeared upon the floor。 I took it up。 There could be no doubt it was the missing tablet。
I groaned with horror； doubting whether I was not out of my senses； but the Stranger continued： 〃Surely you must now see that my explanation； and no other； suits the phenomena。 What you call Solid things are really superficial； what you call Space is really nothing but a great Plane。 I am in Space； and look down upon the insides of the things of which you only see the outsides。 You could leave this Plane yourself； if you could but summon up the necessary volition。 A slight upward or downward motion would enable you to see all that I can see。
〃The higher I mount； and the further I go from your Plane； the more I can see； though of course I see it on a smaller scale。 For example； I am ascending； now I can see your neighbour the Hexagon and his family in their several apartments； now I see the inside of the Theatre； ten doors off； from which the audience is only just departing； and on the other side a Circle in his study； sitting at his books。 Now I shall come back to you。 And； as a crowning proof； what do you say to my giving you a touch； just the least touch； in your stomach？ It will not seriously injure you； and the slight pain you may suffer cannot be compared with the mental benefit you will receive。〃
Before I could utter a word of remonstrance； I felt a shooting pain in my inside； and a demoniacal laugh seemed to issue from within me。 A moment afterwards the sharp agony had ceased； leaving nothing but a dull ache behind； and the Stranger began to reappear； saying； as he gradually increased in size； 〃There； I have not hurt you much； have I？ If you are not convinced now； I don't know what will convince you。 What say you？〃
My resolution was taken。 It seemed intolerable that I should endure existence subject to the arbitrary visitations of a Magician who could thus play tricks with one's very stomach。 If only I could in any way manage to pin him against the wall till help came！
Once more I dashed my hardest angle against him； at the same time alarming the whole household by my cries for aid。 I believe； at the moment of my onset； the Stranger had sunk below our Plane； and really found difficulty in rising。 In any case he remained motionless； while I； hearing； as I thought； the sound of some help approaching； pressed against him with redoubled vigour； and continued to shout for assistance。
A convulsive shudder ran through the Sphere。 〃This must not be；〃 I thought I heard him say： 〃either he must listen to reason； or I must have recourse to the last resource of civilization。〃 Then； addressing me in a louder tone； he hurriedly exclaimed； 〃Listen： no stranger must witness what you have witnessed。 Send your Wife back at once； before she enters the apartment。 The Gospel of Three Dimensions must not be thus frustrated。 Not thus must the fruits of one thousand years of waiting be thrown away。 I hear her coming。 Back！ back！ Away from me； or you must go with me whither you know not into the Land of Three Dimensions！〃
〃Fool！ Madman！ Irregular！〃 I exclaimed； 〃never will I release thee； thou shalt pay the penalty of thine impostures。〃
〃Ha！ Is it come to this？〃 thundered the Stranger： 〃then meet your fate： out of your Plane you go。 Once； twice； thrice！ 'Tis done！〃
Section 18。 How I came to Spaceland； and what I saw there
An unspeakable horror seized me。 There was a darkness； then a dizzy； sickening sensation of sight that was not like seeing； I saw a Line that was no Line； Space that was not Space： I was myself； and not myself。 When I could find voice； I shrieked aloud in agony； 〃Either this is madness or it is Hell。〃 〃It is neither；〃 calmly replied the voice of the Sphere； 〃it is Knowledge； it is Three Dimensions： open your eye once again and try to look steadily。〃
I looked； and； behold； a new world！ There stood before me； visibly incorporate； all that I had before inferred； conjectured； dreamed； of perfect Circular beauty。 What seemed the centre of the Stranger's form lay open to my view： yet I could see no heart； nor lungs； nor arteries； only a beautiful harmonious Something for which I had no words； but you； my Readers in Spaceland； would call it the surface of the Sphere。
Prostrating myself mentally before my Guide； I cried； 〃How is it； O divine ideal of consummate loveliness and wisdom that I see thy inside； and yet cannot discern thy heart； thy lungs； thy arteries； thy liver？〃 〃What you think you see； you see not；〃 he replied； 〃it is not given to you； nor to any other Being to behold my internal parts。 I am of a different order of Beings from those in Flatland。 Were I a Circle； you could discern my intestines； but I am a Being； composed as I told you before； of many Circles； the Many in the One； called in this country a Sphere。 And； just as the outside of a Cube is a Square； so the outside of a Sphere presents the appearance of a Circle。〃
Bewildered though I was by my Teacher's enigmatic utterance； I no longer chafed against it； but worshipped him in silent adoration。 He continued； with more mildness in his voice。 〃Distress not yourself if you cannot at first understand the deeper mysteries of Spaceland。 By degrees they will dawn upon you。 Let us begin by casting back a glance at the region whence you came。 Return with me a while to the plains of Flatland； and I will shew you that which you have often reasoned and thought about； but never seen with the sense of sight a visible angle。〃 〃Impossible！〃 I cried； but； the Sphere leading the way； I followed as if in a dream； till once more his voice