Carl Gustav Jung treated the subject in his thesis On the Psychology and Pathology of So-Called Occult Phenomena (1902) and in an article, Cryptomnesia (1905), suggested the phenomenon in Friedrich Nietzsche 's Thus Spoke Zarathustra.n some cases, the line between cryptomnesia and zeitgeist (compare the concept of multiple discovery in science) may be somewhat hazy. Readers of Lord Byron 's closet drama Manfred noted a strong resemblance to Goethe 's Faust.