I took magic mushrooms in hopes of curing my existential malaise. Instead, the mushroom gave me a master class in the alien strangeness of language, and how even writers are at war with words. (Part Four of a four-part essay. Part One, “The Thing in the Mirror,” is here. Part Two, “’I is an Other’: The Self is a Gothic Fiction,” is here. Part Three, “A Medicine for Melancholy,” is here.) What didn’t happen, last year, when I ingested five dried grams of Psilocybe…