Those who know little about the origin, history, and development of religious opinions would receive a shock, or rather a series of shocks, if they were to inquire into the development of the principal Western faith and if they were able to lay hands on the necessary material. But let them be warned that they will not find such material in official sources. There was once a very voluminous literature which contained the true Christian teaching, but it was completely exterminated by the official church as soon as the latter's triumph over these so-called heresies was established. How ironical it is that reincarnation, the very doctrine which is today regarded as a heresy--that is, a perversion of true doctrine--was originally regarded as an authentic one!
-- Notebooks Category 17: The Religious Urge > Chapter 5: Comments On Specific Religions > # 27