This story may help explain Hume’s ideas. It unquestionably exemplifies them. All of the characters started out with clear, and clashing, identities—the passionate Italian missionary and the urbane French priest, the Tibetan king and lamas, the Siamese king and monks, the skeptical young Scot. But I learned that they were all much more complicated, unpredictable, and fluid than they appeared at first, even to themselves. Both Hume and the Buddha would have nodded sagely at that thought. Although Dolu and Desideri went to Siam and Tibet to bring the wisdom of Europe to the Buddhists, they also brought back the wisdom of the Buddhists to Europe. Siam and Tibet changed them more than they changed Siam and Tibet. And his two years at La Flèche undoubtedly changed David Hume.
It was actually an accident that brought to light the symbolic “sight-restoring” ritual. The decoding effort started as a sort of game between two friends that eventually engulfed a team of experts in disciplines ranging from machine translation to intellectual history. Its significance goes far beyond the contents of a single cipher. Hidden within coded manuscripts like these is a secret history of how esoteric, often radical notions of science, politics, and religion spread underground. At least that’s what experts believe. The only way to know for sure is to break the codes.