This is very troubling for me at times, and I have often struggled with this question. Sometimes I will see a past life scene in a vision, then it fades away. For a few seconds it seems so clear and I feel like it is familiar, but when the image fades away I am left thinking that this place is somewhere I've been, but not in this life. I think that some people may have these recalls of past life imagery, but they may dismiss it as not relating to anything, or irrelevant to the here and now. It seems like those people who believe in past lifes are more likely to pay attention to these sudden flashes of memory. I think that once this awareness sets in, this enhances the emergence of PL memories. Or perhaps we become more aware of them, and are more likely to remember them. I think that we only remember a fraction of the dreams that we have, so to remember the dreams that relate to a past life is perhaps a gift.