CC Ādi 1.96

tattva-vastu — kṛṣṇa, kṛṣṇa-bhakti, prema-rūpa
nāma-saṅkīrtana — saba ānanda-svarūpa
Word for word: 
tattva-vastu — Absolute Truth; kṛṣṇa — Lord Kṛṣṇa; kṛṣṇa-bhakti — devotional service to Lord Kṛṣṇa; prema-rūpa — taking the form of love for Lord Kṛṣṇa; nāma-saṅkīrtana — congregational chanting of the holy name; saba — all; ānanda — of bliss; svarūpa — the identity.
Translation: 
The Absolute Truth is Śrī Kṛṣṇa, and loving devotion to Śrī Kṛṣṇa exhibited in pure love is achieved through congregational chanting of the holy name, which is the essence of all bliss.