Sukadeva Gosvami does not feel hunger or heat. But how many had the qualification to sustain it? While hearing harikatha for millions of births, first sukrti develops, then slowly all anarthas like kama, krodha, moha disappear, then the modes of rajas and tamas cease to have any affect. For example when Sukadeva Gosvami was speaking Srimad-Bhagavatam so many learned personalities were there. Many jnanis, tapasvis, and learned personalities listen to harikatha, but they are unable to sustain it because they do not have a platform (no previous sukrtis). There should be a platform, a foundation, in order to sustain harikatha. Whatever is coming out of my mouth is only inspired by you." Raya Ramananda said that, " I do not know anything. Only Krsna can ask it." Then Mahaprabhu enquired about Krsna-tattva, Radha-tattva, prema-tattva and rasa-tattva. Raya Ramananda said, " No one in the entire universe can ask this question - whether there is anything higher than this. Then Mahaprabhu asked if there was anything higher than that. In the conversation between Raya Ramananda and Caitanya Mahaprabhu, Raya Ramananda started from varnasrama-dharma and went up to gopi-prema. You are all by-products of nama-sankirtana. All that we do must be for the happiness of Krsna, guru and the vaisnavas. Brahmacaris must go for bhiksa on dvadasi and grhasthas should give bhiksa on dvadasi. How did Swamiji preach and get you here? When I first came to the math, I personally visited and preached from house to house, doing a bhagavat lecture in one house, kirtana in another. Our acaryas put special emphasis on this movement and you are present here because of this movement.
But before I begin I would like to say that the backbone of bhakti is the nama-sankirtana movement.