CC Ādi 13.69

kṛṣṇa avatari’ karena bhaktira vistāra
tabe ta’ sakala lokera ha-ibe nistāra
Synonyms: 
kṛṣṇa — Lord Kṛṣṇa; avatari’ — descending; karena — does; bhaktira — of devotional service; vistāra — expansion; tabe — then; ta’ — certainly; sakala — all; lokera — of the people; ha-ibe — there will be; nistāra — liberation.
Translation: 
Śrīla Advaita Ācārya Prabhu thought, “If Kṛṣṇa Himself appears in order to distribute the cult of devotional service, then only will liberation be possible for all people.”
Purport: 

Just as a condemned person can be relieved by a special favor of the chief executive head, the president or king, so the condemned people of this Kali-yuga can be delivered only by the Supreme Personality of Godhead Himself or a person especially empowered for this purpose. Śrīla Advaita Ācārya Prabhu desired that the Supreme Personality of Godhead advent Himself to deliver the fallen souls of this age.