"Bavmor could not possibly have known that the flask was incomplete due to the magical method of its creation. Had Bavmor taken an alchemical approach, he would have known that 10 more ingredients have yet to be found."
- Fitchinger the Great
The religion believes in reincarnation, but that you will be reborn in the past. People of today are those re-born of tomorrow, with some discarded as trash. The most pure will be eventually reborn in the mythical paradise-like past, where people lived for hundreds, or maybe even thousands of years.
This goes nicely with beliefs into foresight (you know a little about the future because you have been there), but also to many complaints of how things are going always from bad to worse.