On sailing off the edge of the world

The Greeks knew that the world was round, and a large number of intellectuals of that era also knew that the world was round, that it had no edge, that you could just keep going until you got back to where you started. Why this myth of sailing off the edge of the world ever got any press is beyond me. Nobody with half a brain in the middle ages ever thought the world to be flat, have edges or not be a globe. The big debate that Columbus had to endure was the actual size of that globe. What is more interesting about sailing off the edge of the world is the image itself: a finite edge with a force field (I imagine) or wall or something holding the water in. What is exactly "off" the edge is what, exactly? Space, the heavens, a vacuum, the big empty, nothingness, a void? Since day-to-day experience shows us nothing of edges where our reality just ends, why would anyone with half a brain try to imagine such a thing? Flat-earthers, if such things exist, perhaps they inhabit that imaginary space off the edge, are not even basing their idea of a flat earth on their own experience of the world, which has no edges. The world seems to be one continuous line, a la Harold and his purple crayon, and one thing just leads to the next both in time and space and any other dimension you might care to imagine, including sub-space, when and if we ever discover its true nature. The idea of "edge", the image of "edge" and the metaphor of "edge" does not give flight to the imagination, but it does stifle creative thought in a very pedestrian and patriarchal fashion. Let's limit our world-view, let's put clamps on the imagination, let's lock up the mind and throw away the key, let's stifle creativity and flights of fancy, let's be mundane, boring, insufferable, controlling, ordinary, dull, routine, dreary, tedious and uninteresting. Freedom to imagine the unbelievable, the chaotic, the wild, the amazing, the mind-boggling world, now that is the life of the healthy mind. Ask Eratosthenes, Librarian of Alexandria, who may have measured the circumference of the earth to be 23,900 miles.