linguistic:voice_change, quality:corruption
Critical and polemic sources

Until discoveries in the 1900s of original sources, the only sources for Manichaeism were descriptions and quotations from non-Manichaean authors, either Christian, Muslim, Buddhist, or Zoroastrian ones. While often criticizing Manichaeism, they also quoted directly from Manichaean scriptures. This enabled Isaac de Beausobre, writing in the 18th century, to create a comprehensive work on Manichaeism, relying solely on anti-Manichaean sources. Thus quotations and descriptions in Greek and Arabic have long been known to scholars, as have the long quotations in Latin by Saint Augustine, and the extremely important quotation in Syriac by Theodore Bar Konai.