CC Madhya 24.97
kāmādi ‘duḥsaṅga’ chāḍi’ śuddha-bhakti pāya
“One is elevated to the platform of devotional life by the mercy of a Vaiṣṇava, the bona fide spiritual master, and by the special mercy of Kṛṣṇa. On that platform, one gives up all material desires and the association of unwanted people. Thus one is elevated to the platform of pure devotional service.