Either you hear from the direct Vedas or scriptures following the Vedas.
Lecture on SB 6.1.40 -- Los Angeles, June 6, 1976: The Yamadūtas were not very advanced so far their position was there. They were very odd-looking and not to be supposed very civilized—uneducated—but how they are explaining about dharma? Because the challenge was that "If you are the servants of Dharmarāja, then explain what is dharma." It doesn't matter whether a man is civilized or uncivilized or good-looking or bad-looking, but if he has got proper guide, then he can speak the right thing. This is the ... Yamarāja ūcuḥ. They're not manufacturing anything. They're saying iti śuśruma. Iti śuśruma, "We have heard it from our master." This is knowledge. They are not expected to manufacture something speculative. They are neither educated nor civilized nor... Nothing of the sort. But they are talking of the source of religion, how they have heard it from the authority, Yamarāja. Yamarāja is authority. In the śāstra it is said that,
- tarko apratiṣṭhaḥ śrutayor vibhinnā
- nāsau munir yasya mataṁ na bhinnam
- dharmasya tattvaṁ nihitaṁ guhāyāṁ
- mahājano yena gataḥ sa panthāḥ
- [Cc. Madhya 17.186]
So dharma, the path of religiosity, is very confidential. Dharmasya tattvaṁ nihitaṁ guhāyām. Then how I shall accept what is dharma, what is religion? Mahājano yena gataḥ sa panthāḥ. You just follow the footsteps of authorized persons. Then you understand what is dharma. You cannot manufacture. So, here is the same system, the Vedic system is the same. Either you hear from the direct Vedas or scriptures following the Vedas.
So here the Yamadūtas says that dharma means what is spoken or directed in the Vedas. And what is Veda? Veda nārāyaṇaḥ sākṣāt. Veda means God Himself.