There was a devoted man, a self-taught yogi on a deserted island in the middle of the ocean. He had all of these devotional practices that were half based on Hindu rituals and half what he had made up.
Because fire is THE most important element in practice, you must work consciously with your fieriness or lack of. It can require tremendous energy to get to a place where fire presides over your practice, where tapas leads you...
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.
Stepping on your mat each day is walking into the forest, practice is sitting down in the middle of that scary place and undertaking to meet the source within...
'Nothingness merged with nothingness', the zero position, Samastitihi this is where IT happens, where I befriend you, the mind horse, I get control of the reins that direct you and the ungraspable becomes graspable.