CC Ādi 6.5
bhaktāvatāram īśaṁ tam
advaitam — known as Advaita; hariṇā — with Lord Hari; advaitāt — from being nondifferent; ācāryam — known as Ācārya; bhakti-śaṁsanāt — from the propagation of devotional service to Śrī Kṛṣṇa; bhakta-avatāram — the incarnation as a devotee; īśam — to the Supreme Lord; tam — to Him; advaita-ācāryam — to Advaita Ācārya; āśraye — I surrender.
Because He is nondifferent from Hari, the Supreme Lord, He is called Advaita, and because He propagates the cult of devotion, He is called Ācārya. He is the Lord and the incarnation of the Lord’s devotee. Therefore I take shelter of Him.