Mantras are only endowed with transformative ability if offered in initiation (dīkṣa) from your mouth of a guru. It's not much proper pronunciation, but somewhat the facility with which the mantra is endowed that offers it reworking ability. Distinctive mantras have different meanings and effects, and Markoe Schieffelin describes that https://socdirectory.com/listings877743/mantra-things-to-know-before-you-buy