Atheists are called demons. In the Vedic literature, those who are atheists, they are called demons, rākṣasas. Just like Rāvaṇa, he was a great scholar in Vedic philosophy. He was son of a brāhmaṇa, and he was very learned. And he materially advanced his kingdom so nice that his capital was called golden. He was so rich. Everything, he was, in every way, in education, in opulence, in power, everything was so great. Only fault was that he was atheist. Therefore he's called rākṣasa, asura. All the asuras that are mentioned in the śāstra, their only fault is that they are atheists. Otherwise, from education point of view, from opulence, they are very much advanced.
So asura prakṛtayaḥ, in the Bhagavad-gītā, also: āsuraṁ bhāvam āśritaḥ.
- na māṁ prapadyante mūḍhāḥ
- duṣkṛtino narādhamāḥ
- māyayāpahṛta-jñānā
- āsuri bhāvam āśritāḥ
- (BG 7.15)
As soon as one becomes atheist, oh, it is very difficult to convince him. You see. Therefore our preaching should avoid the atheist class. Of course, if we stop that, then we cannot find who is theist in the... Time is so nice that 99.9% all atheists. So we have to take the risk of talking with atheist also. But generally it is advised that preachers should not talk this atheist class because they'll not..., they simply argue. Their only point is simply argue and waste your time. That's all. They'll never accept, however you may try to convince him with reason and argument, they'll never... Here is a śloka by Yamunācārya. It is, say, about one thousand years before, this was the same condition for the atheist. He says,
- tvāṁ śīla-rūpa-caritaiḥ parama-prakṛṣṭaiḥ
- sattvena sāttvikatayā prabalaiś ca śāstraiḥ
- prakhyāta-daiva-paramārtha-vidāṁ mattaiś ca
- naivāsura-prakṛtayaḥ prabhavanti boddhum
There are different kinds of authorities. First authority is śāstra, authorized śāstra, scripture. There the description of avatāra, the characteristics and his work, they are mentioned there. And prabalaiś ca śāstrair. Prabala means the very powerful. Just like Vedānta philosophy, it is very powerful. Bhagavad-gītā, it is very powerful. Śrīmad-Bhāgavatam, it is very powerful. So even we give evidences from these powerful śāstras, not only that, prakhyāta-daiva-paramārtha-vidāṁ mattaiś ca, with the opinion of great stalwarts like prakhyāta, very famous. Who is that? Just like Vyāsadeva. Who can be more famous than Vyāsadeva? He's the compiler of all Vedic literatures in the world, Vyāsadeva. And Nārada, he's greatest ṛṣi, sage. Asita, Devala—there are many. Vasiṣṭha. There are many stalwarts. And especially these twelve person, just like Brahmā, Lord Śiva, Manu, Kapila, Mahārāja Prahlāda, Bhīṣma. There are authorities. So even their evidences in the authorized scriptures, even they are accepted by great stalwarts and sages and munis, still, the asura prakṛti, those who are atheistic persons, they'll never accept. They'll never accept. They'll simply go on arguing. The process is that if... Vedic process is if something is mentioned in the Vedas, and it is accepted by the previous ācāryas, then it is accepted. I have nothing to bother. That's all. This is the proce..., the simple process. Suppose I am a fool number one. That doesn't matter. I may be fool, but if I follow the previous authorized ācāryas, then I am all right. Just like a child, he may be a child, innocent child, but if he catches the hand of his father, then he's all right. He can walk. He can cross the street. This is the Vedic process. Vedic process, research, oh, there is no research in Vedic process. What research, nonsense, you'll do? What sense you have got? You shall research about God? The frog philosophy? There is no research. Research, that is not accepted in Vedic philosophy. You have to accept the authority. That's all.