We all have beliefs about our bodies. (And beliefs, by the way, are just an opinion, a thought, that we have held for a very long time.) We may see ourselves as flexible, tight, injured, weak, strong, unable to go upside down, unable to balance, etc. My guess is if you sit for a moment you will come up with half a dozen beliefs you have about your own body. What is most interesting about our beliefs is others usually see through them before we do. And, as teachers, we often see that our students are capable of so much more than they think they are.
In my favorite sutra, sutra 1.12, of the Yoga Sutras, Patanjali refers to Abhyasa or Persevering Practice. Basically a Persevering Practice refers to dedicating yourself to your practice for a long period of time. Then, and only then, will you experience the Yogic state of bliss. The question is, what is a persevering practing?