Hi, I have noticed a pattern with myself which is that when I am deprived of sleep I get flashbacks from past life and also I tend to suddenly be in my mind in other places I have visited in this life, like outside a building, a summer home etc, it last only like 1-3 seconds. So for me I would say the lack of sleep and becoming I suppose more spiritual is effecting one another. There have been few nights that has been close to impossible for me to get a proper night sleep when my flashbacks are running wild and I have to get up and just shake it off and try to get back to real sleep again. Flashbacks can also happen when I am relaxed and bored I suppose when I unintentionally am more receptive to getting flashbacks during the day. I am very used to it now, have had it for many years and it does not effect the rest of my day, I am seen and do feel normal. I have never felt I have much of a choice with these flashbacks, they come when they come. Sleep is very important to me. If I can I make sure I get much of it. If one goes without sleep the brain can not cope in the long run and one have a high risk to become psychotic so it is not to be taken lightly.