C. G. Jung's psychological commentary first appeared in an English translation by R. F. C. Hull in the third revised and expanded Evans-Wentz edition of The Tibetan Book of the Dead. The commentary also appears in the Collected Works. Jung applied his extensive knowledge of eastern religion to craft a commentary specifically aimed at a western audience unfamiliar with eastern religious tradition in general and Tibetan Buddhism specifically. He does not attempt to directly correlate the content of the Bardo Thodol with rituals or dogma found in occidental religion, but rather highlights karmic phenomena described on the Bardo plane and shows how they parallel unconscious contents (both personal and collective) encountered in the West, particularly in the context of analytical psychology. Jung's comments should be taken strictly within the realm of psychology, and not that of theology or metaphysics. Indeed, he warns repeatedly of the dangers for western man in the wholesale adoption of eastern religious traditions such as yoga.