Many of our sources pertaining to 2nd Temple Judaism, including the Apocrypha, pseudepigrapha, Dead Sea Scrolls, Josephus, and Philo, were preserved by Christians, leading Robert Kraft to warn against assuming that they were originally Jewish despite the presence of biblical allusions. Several of these works, such as those associated with Enoch, are pseudepigraphic and retell biblical stories. Others demonstrate the development of wisdom teachings and apocalyptic ideas, with accounts of heavenly ascents, divine revelations, and symbolic visions like those found in earlier texts from this genre.