Text 17] The Advent of Lord Kṛṣṇa: Introduction
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vāsudeva-kathā-praśnaḥ —questions about the pastimes and characteristics of Vāsudeva, Kṛṣṇa;  puruṣān —persons;  trīn —three;  punāti —purify;  hi —indeed;  vaktāram —the speaker, such as Śukadeva Gosvāmī;  pracchakam —and an inquisitive hearer like Mahārāja Parikṣit;  śrotīn —and, between them, the listeners hearing about the topics;  tat-pāda-salilam yathā —exactly as the entire world is purified by the Ganges water emanating from the toe of Lord Viṣṇu.
TRANSLATION
The Ganges, emanating from the toe of Lord Viṣṇu, purifies the three worlds, the upper, middle and lower planetary systems. Similarly, when one asks questions about the pastimes and characteristics of Lord Vāsudeva, Kṛṣṇa, three varieties of men are purified: the speaker or preacher, he who inquires, and the people in general who listen.
PURPORT
It is said,  tasmād guruṁ prapadyeta jijñāsuḥ śreya uttamam  ( Bhāg.  11.3.21). Those interested in understanding transcendental subject matters as the goal of life must approach the bona fide spiritual master.  Tasmād guruṁ prapadyeta . One must surrender to such a  guru , who can give right information about Kṛṣṇa. Herein, Mahārāja Parikṣit has surrendered to the right personality, Śukadeva Gosvāmī, for enlightenment in  vāsudeva-kathā . Vāsudeva is the original Personality of Godhead, who has unlimited spiritual activities.  Śrīmad-Bhāgavatam  is a record of such activities, and  Bhagavad-gītā  is the record of Vāsudeva speaking personally. Therefore, since the Kṛṣṇa consciousness movement is full of  vāsudeva-kathā , anyone who hears, anyone who joins the movement and anyone who preaches will be purified.
TEXT 17
भूमिर्दृष्टनृपव्याजदैत्यानीकशतायुतैः । 
    आक्रान्ता भूरिभारेण ब्रह्माणं शरणं ययौ ॥१७॥
bhūmir dṛpta-nṛpa-vyāja- 
    daityānika-śatāyutaiḥ