As someone who tried past life regression once and finds the idea of past lives interesting, I must admit I do see problems with them as proof. The person I went to didn;t even, for example, go back to early childhood first, just relaxed me with visualisations and then told me to go back to a past life with some significance to my current one and start describing my surroundings and what I was wearing. The problem I see with that is that hyponsis is known to release inhibitions, stimulate the imagination and spontaneous creativity etc - as you can see when stage hypnotists get people to act in amusing ways, so I'm not sure one can be sure that any images that come up are definitely a factual past life or not.
I don;t want to take sides on this, but I imagine (not based on much knowdledge of the area, admittedly) that mainstream scientists dealing with the study of consciousness etc probably on the whole take a skeptical view of claims that regression proves real past lives whereas the view they DO is probably quite common among those therapists that make use of it in practice, probably becasue it seems to help many people, as dave says. It seems fair that if a number of people say the experience helped them and they feel more in control of their lives etc then that is a positive result. On the other hand it still doesn;t
necessarily mean the experience relates to a factual past life for it to have had a therapeutic effect IMO
I must say though, in view of the hard-nosed stance Don takes on this - insisting on siding with the most skeptical, materialistic, fact-driven view - I can;t quite see how this gels with his defence of Christianity, which try as I did, did not seem to make any hard-nosed logical sense at all (or even fluffy, touchy-feely sense either) . I was going to say that in a sense it can be best seen as like a fantasy book which makes sense within its own world and rules, but not when compared to the actual world of facts, history, logic, experience and laws of physics we live in, but even that is not true as it is full of internal inconsistencies that any top-notch fantasy writer - say Tolkein - would have spotted and ironed out.
I see a few possible approaches to believing it - 1. the naive, unquestioning approach - the person who doesn't seek to ask questions and probably doesn't want to hear about theories that would make them doubt (or maybe thinks such things are from the Devil), similar to the obedient/passive approach - like the Roman Catholic who accepts the Pope is always right and the Cathechism can explain everything once and for all 2. the highly academic and theoretical approach whereby a certain type of clever person may be able to convince himself it makes sense, despite the common sense evidence to the contrary, by complicated intellectual contorsions 3. the mystical aproach - going on feelings and not spending too much time reading the Bible and creeds etc 4. the liberal approach, agreeing that traditional explanations are largely a product of their time, and not to be believed too rigidly, but that somehow there is a "core" of values, experiences, traditions and even aesthetics that are valuable. There is also probably the most common approach of those who call themsleves Christian (in the Uk anyway, where I am from originally) , in that it is mostly a matter of tradition and emotion and they have not bothered to examinine it much and see either what the religion precisely teaches or if and why they should believe in it.
If someone wants to believe in it, that's OK, it would take far too long to rehash all the reasons against it, and if anyone wants to find out about them they only have to read sites about atheism, biblical errors, the historical Jesus, comparative religion, church history and so on. However a "true believer"probably won't. i do find it odd though that Don inissts on his credentials as a fiercely logical and intellectually honest person. i mean it has been shown again and again that we know incredibly little about the historical Jesus, for a start, and that credible cases can be put forward for the possibility he did not even exist. Even if that is an extreme viewpoint, a much more common one, for which there is a great deal of evidence, is that he was a very minor figure in his time who was built up into a figire of mythic proprtions after his death. So how you can base a whole belief system of eternal salvation and damnation around the obligation to hold certain improbable beliefs about this character, when you have access to such information as now exists, instead of being forced by lack of information and social and legal pressures, to conform (as in the past), I'm not sure. Christianity is also internally inconsistent with Judaism, the faith it sprung from - which, for example , has no concept of original sin and a concept of the Messiah quite at odds with the one Jesus is purported to have provided.
On the other hand, it could also be argued that "New Age" type beliefs, while more immediately appealing and somewhat more consistent and more easily believable, are only so because they are a reaction (and human construct, based partly on a pick'n'mix of western and eastern ideas) against the problems with the traditional western default religion, substituting the confusingly inconsistent God of the Testaments with one who is PUL, substituting eternal black and white judgment with eternal "spiritual evolution" and learning and so on. Also, for example, ditching the wildly improbable Christian notion of the resurrection of the body and final judgment (itself - the judgment - hugely pointless as most christian denominations say you are immediately assigned Heaven or Hell after death anyway, or Purgatory, which is an antechamber of Heaven) in favour of a mix of otherworlds and reincarnations for endless experiences and learnings, which appeals to the modern, educated, liberal mind.
Just playing Devil's Advocate (for both sides