i have heard the theory many times before. i agree partially, that in some cases thinking has an influence on physical health... but can we blame a person that was born physically different i.e. a hump on his back? if not, and not everything is based on mental cause then where is the dividing line? also - is it possible that as every person is different physically and they have a different length of bones, color of hair - then their nervous system is made differently as well? which may result in some differences in the body's response to natural conditions. and maybe POTS is not a disease, but a different way of living in the world? different kind of energy. i know, that scientist say that animals do not have many diseases that human do but it may only mean that the ones not fitted - i.e. penguins with POTS will simply not survive - they will not get up and run after parents from a nest... or as in my case - i am nearly 6 feet tall, and it is only our technology, hormons etc that let me grow so much in the past. in nature - our bone structure was not naturally made for this height. so gravity is taking its toll on my bones... and, as with every and each theory... nobody REALLY KNOWS. they all fight trying to convince us that they know. btw - why do we have to know? h.