kṛṣṇa-bhakti - of devotional service to Kṛṣṇa; janma-mūla - the root cause; haya - is; sādhu-saṅga - association with advanced devotees; kṛṣṇa-prema - love of Kṛṣṇa; janme - awakens; teṅho - that same association with devotees; punaḥ - again; mukhya aṅga - the chief principle.

“The root cause of devotional service to Lord Kṛṣṇa is association with advanced devotees. Even when one’s dormant love for Kṛṣṇa awakens, association with devotees is still most essential.