Translation: "Sūta Gosvāmī said: Mahārāja Parīkṣit, the son of Uttarā, after hearing the speeches of Śukadeva Gosvāmī, which were all about the truth of the self, applied his concentration faithfully upon Lord Kṛṣṇa."
Prabhupāda: So here is, vacas tattvam ātmā ni,...ātmā, vacas tattva, niścayam ātmā. Vacas tattva-niścayam ātmanaḥ. Vaiyāsaki. So ātma-tattva, self realization, this is required. So we have to approach a person like Vaiyāsaki, Śukadeva Gosvāmī. Niścayam. Vacas tattva-niścayam. If you want to know positively, niścayam, without any mistake, then you have to approach a person like Śukadeva Gosvāmī or the paramparā system, who is coming in disciplic succession of paramparā system. The paramparā system means... Just like we claim paramparā system from Kṛṣṇa. So whatever Kṛṣṇa says or He said 5,000 years ago, we are repeating the same thing. That is called paramparā system. Not that "The world has changed. Scientific advancement is very great. Now we can interpret in this way and that way." This is all nonsense. All nonsense. You cannot change a single alphabet. They are all unmistakable. They cannot be changed. So that is niścayam ātmanaḥ.
If you want to know positively, what is God, then we should take lesson from a self-realized soul who has understood, who has seen. Jñāninas tattva-darśinaḥ (BG 4.34). Just like here it is tattva-niścayam ātmanaḥ. So tattvam, the truth, so one must have seen the truth, realized the truth. Tad-vijñānārthaṁ sa gurum evābhigacchet (MU 1.2.12). That is guru. Means one who has seen the truth. How he has seen the truth? Through the paramparā system. Kṛṣṇa said this, and then Brahmā said the same thing, then Nārada said the same thing, Vyāsadeva said the same thing, and then disciplic succession, Madhvācārya, Mādhavendra Purī, Īśvara Purī, Lord Caitanya, Ṣaḍ-gosvāmī, Kṛṣṇadāsa Kavirāja Gosvāmī, Śrīnivāsa Ācārya, Narottama dāsa Ṭhākura, Viśvanātha Cakravartī Ṭhākura. In this way. Jagannātha dāsa Bābājī, Gaura Kiśora dāsa Bābājī, Bhaktisiddhānta Sarasvatī. Then we are speaking. The same thing. Not that "Because we are modernized... Your modern science has changed." Nothing has changed.