Kṛṣṇa ordered that this is brahmāstra. He could not understand that intolerable temperature, heat, and Arjuna inquired, "Wherefrom the heat is coming?" So Kṛṣṇa informed him that "This is due to brahmāstra released by Aśvatthāmā. This rascal does not know how to counteract it." Naivāsau veda saṁhāram. "He does not know." Formerly, in the military science, you have released one kind of arrow . . . If I am expert, then I can release another arrow which will counteract your arrow. Naivāsau veda saṁhāram. It is called saṁhāram. So Aśvatthāmā released that brahmāstra. Now Kṛṣṇa advised Arjuna that "You release this saṁhārāstra," how to counteract. Unnaddham astra-jñaḥ. Unnaddham: "You know better than him how to counteract." Hi astra-tejasā: "By another . . ." (break) . . . different astras are released by different expert military men. So that science is not yet discovered. By mantra. Just like here it is said that he took water, apaḥ. Spṛṣṭvāpas taṁ parikramya. Apaḥ. Just like we take, oṁ apavitraḥ pavitro vā sarvāsvasthāṁ gato 'pi vā. Similarly, mantra and water can be utilized for very, very important purpose. Simply mantra and water. So this is the science. This is called subtle science, not gross. They have discovered this atomic weapon—they require so many chemicals. But when you come to the higher stage, subtle, then mantra and water will do. Nothing more. No more chemicals. Simply mantra and water. That is yet you have to learn.
But these things are there in the Vedas. If you are a serious student of Veda you can also learn, you can also fight like Arjuna. There is no difficulty. Therefore Kṛṣṇa says astra-jñaḥ. Unnaddham astra-jñaḥ. You can also become learned in the higher science of military art. You can also utilize. But that requires brain, good brain. That is not possible now, because the culture is lost. Now everyone is śūdra. Nobody is kṣatriya, nobody is brāhmaṇa. By the time . . . Kalau śūdra sambhava. The śūdras cannot learn all these Veda. Because śūdras have no right to understand Vedic knowledge. It is meant for the brāhmaṇas, kṣatriyas. Even not for the vaiśyas. Striyo vaiśyās tathā śūdrāḥ. They are rejected, woman and vaiśya and śūdra. Kṛṣṇa says. Striyo vaiśyās tathā śūdrāḥ. But Kṛṣṇa says, te 'pi yānti parāṁ gatim: "Even woman and śūdra and vaiśyas, low grade, they can also get parāṁ gatim, promotion to the transcendental world." How? Māṁ hi pārtha vyapāśritya ye 'pi syuḥ pāpa-yonayaḥ (BG 9.32).
If you take to Kṛṣṇa consciousness, then even these low-grade-born persons, beginning from striya, śūdra, vaiśya, and down, caṇḍālas . . . Caṇḍālas . . . means less than the caṇḍāla. Kirāta-hūṇāndhra-pulinda-pulkaśāḥ. They are caṇḍālas. Kirāta means the black clan, or the Africans. So they are called kirāta. Hūṇāndhra-pulinda-pulkaśā ābhīra-śumbhā yavanāḥ khasādayaḥ (SB 2.4.18). Yavanas, khasādaya, Mongolians, without any moustaches. Kirāta-hūṇāndhra-pulinda-pulkaśā ābhīra-śumbhā yavanāḥ khasādayaḥ ye 'nye ca pāpāḥ. "Even there are still more low-grade, sinful society," ye 'nye ca pāpā yad-apāśrayāśrayāḥ, "if he takes the shelter of a pure devotee, śudhyanti, becomes purified." Becomes purified. How? Śudhyanti. Because prabhaviṣṇave namaḥ. Lord Viṣṇu has got so exalted power that through His devotee He can purify anyone, never mind, even one happens to be caṇḍāla, and what to speak of others. Kiṁ punar brāhmaṇāḥ puṇyā bhaktā rājarṣayas tathā (BG 9.33). If they can be delivered, so what to speak those who are brāhmaṇas. Brāhmaṇa means puṇya. Without having background of pious activities, nobody can take birth in rich family, in brāhmaṇa family. Nobody can become highly learned person, nobody can become beautiful. Janmaiśvarya-śruta-śrī (SB 1.8.26). They're the action, reaction of puṇya. And just the opposite is pāpa. So everyone—there is no question of pāpī or puṇya—if anyone takes shelter of Kṛṣṇa, māṁ hi pārtha vyapāśritya ye 'pi syuḥ pāpa-yonayaḥ (BG 9.32), it doesn't matter. Everyone can be elevated to the transcendental position of Kṛṣṇa consciousness.
So this movement is there. Take advantage of it and elevate your life, and finish the material trouble. Duḥkhālayam aśāśvatam (BG 8.15). It is only simply full of miseries and temporary. This business must be stopped. And yad gatvā na nivartante tad dhāma paramaṁ mama (BG 15.6), simply by going back to home, back to Godhead, your all problems of life will be solved.