If we go on hearing hari-kathā from the Lotus mouth of śuddha Guru-Vaiṣṇava, then by drinking that kind of nectarine hari-kathā, we can develop tremendous faith (śraddhā) in Guru-Vaiṣṇava-Bhagavan- dhāma–nama etc. and at the same time we can gradually forget all our body or body related things. According to the ratio of hearing of pure hari-kathā we can purify ourselves accordingly. From Śrīmad Bhāgavatam we know the flowing śloka—
yathā yathātmā parimṛjyate ’sau
mat-puṇya-gāthā-śravaṇābhidhānaiḥ
tathā tathā paśyati vastu sūkṣmaṁ
cakṣur yathaivāñjana-samprayuktam (ŚB 11.14.26)
According to the ratio of hearing of hari-kathā from genuine source (authentic source) one can clean heart to see all super fine objects relating to that aprākṛta jagat, just like by the application of Ayurvedic black medicine into eyes one can develop eyesight.
Also from Śrīmad Brihad Bhāgavatamrita written by Srila Sanatan Gosvamipad we know the following śloka—
krsna-bhakti-sudha-panad
deha-daihika-vismrteh
tesam bhautika-dehe ’pi
sac-cid-ananda-rupata
“Having drunk the nectar of devotion to Krsna, those devotees forget their material bodies and body related things. Thus even while living in material bodies, they assume the transcendental nature of eternity, knowledge, and bliss.”