Limits…..what limits?

I am reading a book by Eldon Taylor entitled "I Believe, When What You Believe Matters!".  To be honest, my reading his words is much like preaching to the choir.  The gist of the book is expressing the belief that our minds are capable of so much more than we give them credit for.  He discusses examples such as the research carried on with those capable of extraordinary feats with the use of their minds.  Examples such as savants immediately come to mind, but what about the extensive experimentation with plants.  And how can one explain the placebo effect?  As I read this book, I began considering how I, as well as so many others in my acquaintance, set limits on ourselves that are so arbitrarily low.  When I was involved in science in my earlier life, I was often amazed at how some of my colleagues could be so blinded by one hypothesis, even when it became blatantly apparent that the probability of the hypothesis being correct was extremely remote.  They would devise experiment after experiment in the attempt to show that previous results were in error and their hypothesis was in the end the correct one.  To this day I am constantly amazed at the reluctance of friends to even consider anything beyond their narrow scope of reality.  I have someone close to me who claims to be a diehard Catholic, yet when someone close to them died they could not believe in their heart that there is life after the demise of our physical being.  Even now with the work being carried out in "string theory" proposing the existence of at least seven dimensions beyond those of our experience there is still such a reluctance to accept the potential of "spirits".  Sadly, perhaps I am the worst culprit.  In my practice of shamanism, I repeatedly have experienced results far beyond the practical limits of circumstance.  I am amazed at the clarity of vision.  Yet, half an hour later I am back to the doubts that seem to plaque my practice.  I guess this is faith, the ability to carry on when our doubts cloud our reason.  But what if my doubt shows through my facade.  What if those that I could possibly help in some way shy away because my doubt shows through my enthusiasm?  I am saddened when those I really believe I could help will not even allow the attempt.  Is my doubt reenforcing their limits, preventing them from visualizing the possibility of healing to occur?  The thought of this is extremely bothersome to say the least.  I do know that I am getting better, that my faith in those helping spirits is becoming stronger.  I must accept that my role is minor, that the power comes from the universe, and that I am only the conduit through which it expresses itself.  I believe I must look beyond the doubts that saturate my ego and allow the faith I have in my Creator, and in all those helping spirits, to emerge in the light of day.  I do know in my heart that what I do is very real.  I do know in my heart that my path is true.  And I do know in my heart that I will carry on.