Prior to the discovery of Nag Hammadi, the Gnostic movements were largely perceived through the lens of the early church heresiologists. Johann Lorenz von Mosheim (1694–1755) proposed that Gnosticism developed on its own in Greece and Mesopotamia, spreading to the west and incorporating Jewish elements. According to Mosheim, Jewish thought took Gnostic elements and used them against Greek philosophy. J.Horn and Ernest Anton Lewald proposed Persian and Zoroastrian origins, while Jacques Matter described Gnosticism as an intrusion of eastern cosmological and theosophical speculation into Christianity.