A close associate of Jung, Marie-Louise von Franz, stated towards the end of her life that the concept of synchronicity must now be worked on by a new generation of researchers. For example in the years since the publication of Jung’s work on synchronicity, some writers largely sympathetic to Jung's approach have taken issue with certain aspects of his theory, including the question of how frequently synchronicity occurs. For example, in The Waking Dream: Unlocking the Symbolic Language of Our Lives, Ray Grasse suggests that instead of being a "rare" phenomenon, as Jung suggested, synchronicity is more likely all-pervasive, and that the occasional dramatic coincidence is only the tip of a larger iceberg of meaning that underlies our lives. Grasse places the discussion of synchronicity in the context of what he calls the "symbolist" world view, a traditional way of perceiving the universe that regards all phenomena as interwoven by linked analogies or "correspondences." Though omnipresent, these correspondences tend to become obvious to us only in the case of the most startling coincidences. The study of astrology, he argues, offers a practical method of not only becoming more conscious of these subtle connections but of testing and even predicting their occurrence throughout our lives.