Chapter 21 of the second edition of Flatland contains the following quote:
I AWOKE rejoicing, and began to reflect on the glorious career before me. I would go forth, methought, at once, and evangelize the whole of Flatland. Even to Women and Soldiers should the Gospel of Three Dimensions be proclaimed. I would begin with my Wife.
The text contains numerous references like this.
What's the author's point in referring to this as a Gospel, and speaking of evangelizing and making converts? Is he intending to parody Christianity here and, if so, why?