Śrīla Gurudeva: What is the symptom of a guru-sevaka, a true servant of guru?
Vṛndāvanadāsa: He has no ambition in life but to serve śri gurudeva.
Vrajanātha dāsa: He follows the order of gurudeva, and he does not
associate with anyone who does not follow gurudeva’s order.
Śrīla Bhaktivedanta Nārāyaṇa Mahārāja: This is the main consideration. He maintains friendship with only those who are serving śri gurudeva; he maintains a bosom friendship with them. With regard to those who disobey or have no service mood, he remains very far.
Śrīpāda Bhaktivedanta Mādhava Mahārāja: Once you told us that during the solar
eclipse at Kurukṣetre, the queens of Dvārakā asked Draupadī, “We
are 16,108 queens, yet we cannot control Kṛṣṇa; whereas you control
your five husbands, and also Kṛṣṇa. Do you know any black magic?”
Draupadī said, “No, I don’t know any black magic. I love only those
who love the Pāṇḍavas, and I never speak with those who are inimical
to the Pāṇḍavas. This is how I control them.”
Śrīla Bhaktivedanta Nārāyaṇa Mahārāja: “If someone loves the Pāṇḍavas,
I love him. Otherwise, I have no relation with him.”
Madhuvrata dāsa: Śrila Gurudeva, if a person has no relationship
with śri guru, we should not have any relationship with him?
Śrīla Bhaktivedanta Nārāyaṇa Mahārāja: You may relate with anyone in a general way, but do not have a bosom friendship with those who don’t obey gurudeva –
who have other ambitions and who don’t want to serve. By their
contaminated association their qualities will come to you, and
then you will also become disobedient to your gurudeva.

Morning Walks and Conversations with Śrīla Bhaktivedanta Nārāyaṇa Mahārāja 2009