Faerie is a perilous land, and in it are pitfalls for the unwary and dungeons for the overbold.

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The realm of the [faerie]-story is wide and deep and high and filled with many things: all manner of beasts and birds are found there; shoreless seas and stars uncounted; beauty that is an enchantment, and an ever-present peril; both joy and sorrow as sharp as swords.

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In that realm a [person] may, perhaps, count [themselves] fortunate to have wandered, but its very richness and strangeness tie the tongue of a traveller who would report them. And while [they are] there it is dangerous for [them] to ask too many questions, lest the gates should be shut and the keys be lost. (J.R.R. Tolkien)