CC Ādi 5.148

ācārya-gosāñira tattva nā yāya kathana
kṛṣṇa avatāri yeṅho tārila bhuvana
Word for word: 
ācārya-gosāñira — of Advaita Ācārya; tattva — the truth; nā yāya kathana — cannot be described; kṛṣṇa — Lord Kṛṣṇa; avatāri — making descend; yeṅho — who; tārila — delivered; bhuvana — all the world.
Translation: 
I cannot describe the truth of Advaita Ācārya. He has delivered the entire world by making Lord Kṛṣṇa descend.