CC Madhya 22.17
- kṛṣṇa-bhakti haya abhidheya-pradhāna
- bhakti-mukha-nirīkṣaka karma-yoga-jñāna
kṛṣṇa-bhakti—devotional service to Lord Kṛṣṇa; haya—is; abhidheya-pradhāna—the chief function of the living entity; bhakti-mukha—of the face of devotional service; nirīkṣaka—observers; karma-yoga-jñāna—fruitive activities, mystic yoga and speculative knowledge.
"Devotional service to Kṛṣṇa is the chief function of the living entity. There are different methods for the liberation of the conditioned soul—karma, jñāna, yoga and bhakti—but all are dependent on bhakti.