Correcting Unshakeable Belief…
I’ve been working with a trumpet student recently. He likes to play his trumpet standing, and as he does so he juts his pelvis forwards and pulls his upper thoracic spine backwards – a bit like the shop dummies at many UK clothing stores! I’ve worked with him; explained how the extension through his thoracic spine prevents movement in his ribs and interferes with his breathing; done hands-on work and given him the experience of the improvement of tone and breath control when he stops the ‘H&M pelvic thrust’.
So has he changed it? Nope.
You see, he is convinced it helps him reach the high notes. Even though he knows that change in pitch happens via valves and embouchure, on some level he believes that the extension in his spine is essential for high notes, and that he won’t reach them if he doesn’t do it. He has an apparently unshakeable belief in the necessity of jutting his pelvis forwards.
I’m sure that most of us, if pushed, could think of a similar experience. I can clearly remember having a very similar interaction with my tennis teacher.
So why didn’t I do what my tennis teacher told me? Why doesn’t my trumpet student do what I suggest, especially when he has had a clear demonstration of the improvement he could experience? After all, if we’re paying a teacher to help us, why don’t we follow their advice?
The answer is that, on some level, we believe that we know better. We have an (apparently) unshakeable belief. And correcting unshakeable belief seems like a very big thing to accomplish.
A question of belief
Everything we do and every action that we make is, ultimately, a result of the constellation of ideas and beliefs that we hold to be true, and that constitute what FM Alexander called our psycho-physical make-up.
We all think and act (except when forced to do otherwise) in accordance with the peculiarities of our particular psycho-physical make-up. 
When we carry out an action it is because, whether we are aware of it or not, it conforms to our image of ourselves and our place in the world. My student, for example, just his pelvis forwards when he changes pitch because on some level he believes he has to. It conforms to his beliefs about himself and trumpet playing. When I come along and demonstrate to him that he doesn’t need to make the jutting movement with his pelvis, I create for the student a dilemma. Do he believe me, or do he trust in his own untested beliefs?
This is the challenge faced by a student in pretty much any Alexander Technique lesson. If the demonstration is sufficiently strong or the previous belief not strongly held, then the student will change what they are doing quickly and easily. But if the teacher’s demonstration challenges a movement behaviour that keys into a core belief about what the student needs to do to exist in the world, then they are likely to cling to the old behaviour.
But the dilemma won’t go away. It will sit in the student’s mind and irritate, a bit like having a stone in your shoe. Sooner or later, my student is going to have to think about his jutting pelvis!
So how do you deal with this situation?
As a teacher, you just have to accept that sometimes (often?) the student thinks they know better than you. Your job is to, in Alexander’s words, “the placing of facts, for and against, before the [student], in such a way as to appeal to his reasoning faculties, and to his latent powers of originality.”  You can’t take any responsibility for a student’s understanding, only your presentation of material before them!
As a student, you have to approach each lesson mindful of the fact that you come bearing beliefs and assumptions that probably aren’t helping you. If your teacher suggests a change to what you are doing, you need to inhibit your instinctive response (to disagree!) and then as open-mindedly as possible, try what your teacher suggests.
Correcting unshakeable belief is a matter of playing the long game. Just keep presenting the facts (if you’re the teacher), and keep trying to have an open mind (if you’re the student). Sooner or later, something has to give.
 FM Alexander, Constructive Conscious Control of the Individual, IRDEAT complete ed., p.304.
 FM Alexander, Man’s Supreme Inheritance, IRDEAT complete ed., p.88.