Spiritual master’s instructions’ are instructions of Sri Krishna.
One could become conqueror of the 3 worlds, first private victory then other victories. Private personal victory is becoming victorious by conquering the mind that is first victory. Then mind is not conquered all victories are futile or all victories are defeat only if the mind is not conquered.
There are varieties of austerities to be performed by body, some by tongue, some by mind- austerities one must perform.
You could be personal with the holy name because holy name is Lord himself, you could reveal your heart to be holy name and holy name is very kind, could listen to your sincere prayers.
In Kaliyug, Krishna has come in the form of the holy name. Thus, we can be personal with the holy name because holy name is Lord Himself. We can reveal our heart to the holy name and holy name is very kind, it reverts to our sincere prayers.
What binds people together is only Krishna consciousness culture.