regarding the New Age movement and channeling in particular, Wikipedia cites Suzanne Riordan:
“In the flood of channeled material which has been published or delivered to “live” audiences in the last two decades, there is much indeed that is trivial, contradictory, and confusing. The authors of much of this material make claims which, while not necessarily untrue or fraudulent, are difficult or impossible for the reader to verify. There are, however, a number of other channeled documents which address issues more immediately relevant to the human condition. The best of these writings are not only coherant and plausible, but eloquently persuasive and sometimes disarmingly moving.”
Riordan, Suzanne (1992). “Channeling: A New Revelation?”. Perspectives on the New Age. James R. Lewis and J. Gordon Melton (editors). New York: State University of New York Press. pp. 105–126. ISBN 0-7914-1213-X.