srnvatah sraddhaya nityam grnatas ca sva-cestitam kalena natidirghena
bhagavan visate hrdi
bhagavan visate hrdi
TRANSLATION: Persons who hear Srimad-Bhagavatam regularly and are always taking the matter very seriously will have the Personality of Godhead Sri Krsna manifested in their hearts within a short time.
pravistah karna-randhrenasvanam bhava-saroruhamdhunoti samalam Krsnahsalilasya yatha sarat
TRANSLATION: The sound incarnation of Lord Krsna, the Supreme Soul [i.e. Srimad-Bhagavatam], enters into the heart of a self-realized devotee, sits on the lotus flower of his loving relationship, and thus cleanses the dust of material association, such as lust, anger and hankering. Thus it acts like autumnal rains upon pools of muddy water.
The comparison to the autumnal rain that falls on muddy reservoirs of water is very appropriate. During the rainy season, all the waters of the rivers become muddy, but in the month of July-August, the autumn season, when there is a slight rainfall, the muddy waters of the rivers all over the world become at once clear. By addition of some chemical, a small reservoir of water like that of a metropolitan waterworks tank can be cleared, but by such a tiny effort it is not possible to clear up all the reservoirs of water like the rivers. A powerful pure devotee of the Lord, however, can deliver not only his personal self but also many others in his association.
By sincere efforts to hear Srimad-Bhagavatam one realizes his constitutional relationship with the Lord in the transcendental humor of servitude, friendship, paternal affection or conjugal love, and by such self-realization one becomes situated at once in the transcendental loving service of the Lord.
Not only were all the pure devotees like Narada self-realized souls, but they were engaged in preaching work automatically by spiritual impetus, and thus they delivered many poor souls entangled in the material modes. They became so powerful because they sincerely followed the Bhagavatam principles by regular hearing and worshiping. By such actions the accumulated material lusts, etc., become cleansed by the personal endeavor of the Lord within the heart. The Lord is always within the heart of the living being, but He becomes manifested by one's devotional service.