Śrīla Prabhupada: “Narottama dāsa Ṭhākura has sung, śrī-kṛṣṇa-caitanya prabhu dayā kara more. He prays for Lord Caitanya’s mercy because He is the mercy incarnation, having appeared especially to claim the fallen souls. The more fallen one is, the greater one’s claim to the favor of Lord Śrī Caitanya Mahāprabhu. One must only be very sincere and serious. Despite being contaminated by all the bad qualities of this Kali-yuga, if one surrenders unto the lotus feet of Śrī Caitanya Mahāprabhu, the Lord will surely and certainly deliver him”
(Śrī Caitanya-caritāmṛta » Ādi-līlā 16.1 » Purport | 1974 Edition)

Śrīla Prabhupada: “Yes, we should always think ourself as the most fallen, the most ignorant, and it is simply by the Mercy of Lord Caitanya that we have even the opportunity to serve Krishna. We have no qualification of our own; it is simply by the merciful glance of this Most Munificent Appearance of the Supreme Personality of Godhead, Sri Caitanya Mahaprabhu, that we have been given the chance to serve Radha and Krishna.”
(Letter to: Malati — Los Angeles, 12 November, 1968)