Lets say Guru of the center only comes to visit few times per year, thus spiritual aspirants don't have a lot of prior contact with that person. Guru initiates whole group with the same mantra, thus not individually.
Who is a true Guru. Do you need to develop a special relationship. Or spiritual connection is good enough?
What is the correct way to transfer Mantra. Should it be always done one on one. With mantra given based on the individual and not to the whole group?