natra cintyo 'ri-suddhyadir
nari-mitradi-laksanam
siddha-sadhya-susiddhari-
rupa natra vicarana
There is
sodhana, or purification of the
mantra, but there is no such consideration for the
Krsna mantra. Balitvat krsna-mantranam samskarapeksanam na hi. "The Krsna
mantra is so strong that there is no question of
sodhana. (1.235)
As far as
diksa is concerned, one should consult
Madhya-lila, Chapter Fifteen (
108). On the whole, when a person is initiated according to the
pancaratrika-vidhi, he has already attained the position of a
brahmana. This is enjoined in the
Hari-bhakti-vilasa (2.12):