In many schools of spirituality, there are discussions about mantras and lineages.
It is said that a mantra must be given by a Guru to specific disciple in a specific manner. Absolutely true I’m sure.
It is also said to vary from Guru to Guru, from lineage to lineage.
And the ways of chanting each mantra and the various things to focus on, and of course accompanying visuals and dreams and what not.
My Guru is very clear. “Let the lineage be anything, what will you do with it?”
“Have you given up your desires and attachments?”
It’s that simple, without which he says nothing else matters.