Complete the short story/flash fiction, that has the following first paragraph:
In four millennia the Gates of Meridian had never been breached even though many had tried. The Light had tried in an effort to vanquish the Dark that threatened all. The Dark had tried in an effort to defeat the Light that never let them achieve their dreams. Each had reasons. Each had opportunity. And yet, the Gates held. This did not mean that the Gates prevented everyone from passing through. Indeed, the Gates were only a filter that prevented large-scale incursions. A few, determined, individuals could penetrate the gates if their motives were pure. But what constitutes a pure motive for either side was only known to the Gatekeeper and, at this point in time, they were in school learning to write.
Post a link to the story in the comments.