Devotee: One who has laukika-sraddha has to act under the guidance
of one who has sastriya-sraddha?

Gour Govinda Swami: Yes. He should have a guru, a bonafide Vaisnava
guru. He should do bhajana under such expert guidance. He should not
act whimsically. Unless you have guru, how can you preach? Sravana
kirtana, preaching means kirtana. Unless one has heard from a
bonafide guru, what will he preach? What he has heard, he will say
that thing. "I have heard this from authorities, from my guru."
Preaching is another name for sravana, another name for hearing.
What I've heard I'm repeating. Therefore, only one who has heard, he
can preach and do kirtana. Otherwise who can do kirtana? One who has
not heard, what will he say, and who will hear all those nasty
things?

- Krishna Prema Bhakti, 'A Society Without Envy' (Q&A Session).