Attaining a mature practice can only happen through piling up nearly countless failed attempts to become skilled enough in the techniques to avoid the painful consequences that come from wrong thinking, wrong effort, mistakes, misperceptions, and other for
Resisting pain can frustrate you and challenge your resolve to practice and thus it is essential to see that the obstructions that appear in your path, whether physical or mental, are meant to be there for your learning and growth.
One of yoga's GREAT gifts is to show you your limits, To show you that despite thinking you are giving everything you have to give it is not enough.