Kṛṣṇa, by His Paramātmā feature, He is all-pervading. He is in all universes. He is all, everywhere, in the heart of all living entity. Īśvaraḥ paramaḥ . . . Īśvaraḥ sarva-bhūtānāṁ hṛd-deśe 'rjuna tiṣṭhati (BG 18.61). And He is also within the atom. Aṇḍāntara-stha-paramāṇu-cayāntara-stham (Bs. 5.35). Aṇor aṇīyān mahato mahīyān. This is Kṛṣṇa. So one has to understand Kṛṣṇa perfectly.
So for preliminary study of Kṛṣṇa, there is Bhagavad-gītā, how to understand Kṛṣṇa. And next . . . Bhagavad-gītā is the A-B-C-D, primary entrance to the understanding of spiritual life. This is A-B-C-D. But people are so fallen that they cannot understand even A-B-C-D, what to speak of becoming graduate or postgraduate. In this age people are so fallen. This Mahābhārata . . . Mahābhārata was given by Vyāsadeva for the less intelligent class of men: strī-śūdra-dvija-bandhūnāṁ trayī na śruti-gocarā (SB 1.4.25). Śruti means Vedas. Vyāsadeva considered that stri, woman; śūdra, the fourth-class men . . .
Strī-śūdra-dvija-bandhūnām . . . dvija-bandhu means those who are born in higher-class society—brāhmin, kṣatriya, vaiśya—but they are not qualified. They are simply proud of getting birth in higher families. They are called dvija-bandhu. They are equal to woman and the śūdra. Strī-śūdra-dvija-bandhūnāṁ trayī na śruti-gocarā. Trayī means the Vedas. Karma-kāṇḍa, jñāna-kāṇḍa, upāsana-kāṇḍa. There are three methods in understanding Vedas, and their language, their process, is very difficult.
Therefore Vyāsadeva, considering the immediate inauguration of Kali-yuga . . . because Vyāsadeva appeared at the end of Dvāpara-yuga. So before writing these Vedas, Vyāsadeva, by Vyāsadeva, there was no written scripture. Therefore these Vedas are called śrutis. People learn it simply by hearing, śruti. Śrotram. Śrotriyam. Tad-vijñānārthaṁ sa gurum eva abhigacchet śrotriyaṁ brahma-niṣṭham (MU 1.2.12). Śrotriyam means the guru must be expert who has heard from his bona fide spiritual master. That's śrotriyam, not śaukram. Śaukram means generation by semina, and śrotriyam, generation by hearing from the bona fide spiritual master. Śrotriyaṁ brahma-niṣṭham. After hearing, one must be firmly fixed up in brahma-jñāna. Brahma-niṣṭham. This is called śrotriyam.
So dvija-bandhu means who has not perfected his knowledge by hearing from the bona fide source. He is called dvija-bandhu. And the śūdras have no facility, neither the woman has got the facility to go to the gurukula and become a brahmacārī and remain there and learn the Vedic literature. Because women were not allowed, neither could follow. It is not discrimination; it is actual fact by nature. There may be some exception, but by nature it is so fixed up. So for them, this Mahābhārata, greater history, or history of greater India, Mahābhārata.
This bhārata . . . bhārata means this planet, not this small land now we are occupying. No. This whole planet is called Bhārata-varṣa. Since the time of Mahārāja Bharata . . . he was the emperor of the whole world. Formerly we understand from history that the king of Hastināpura was the emperor of the whole world, up to Mahārāja Parīkṣit, five thousand years ago. After that, it became separated on account of depreciation of the Vedic culture. They could not control. Just like we could not control Pakistan. They have gone away. Pakistan, twenty years ago, it was India, but they have left you. The Mussulmans, they left you because you could not control them. That is your fault.
And the fault is depreciation of the Vedic culture. In the Vedic culture there is no such thing that once one has become fallen, he cannot be reclaimed. He can be reclaimed. It doesn't matter however fallen he is. Just like in the Bhagavad-gītā Kṛṣṇa says, māṁ hi pārtha vyapāśritya ye 'pi syuḥ pāpa-yonayaḥ (BG 9.32). Pāpa-yoni. According to Vedic culture the lower class of people . . . lower class of people means one who cannot be educated to the Vedic culture. He is called lower class. Otherwise the Vedic culture is open for everyone. So Kṛṣṇa says, māṁ hi pārtha vyapāśritya ye 'pi syuḥ pāpa-yonayaḥ. Never mind, papa-yoni. He can be claimed. Striyaḥ śūdrās tathā vaiśyās te 'pi yānti parāṁ gatim.
So suppose these Muhammadans or others in India . . . the Muhammadans, these Muhammadans, did not come from any other part of the world. They were lower class and they, after Aurangzeb's propaganda of jizyah tax, some of them or more of them, they became Mussulmans. This is the historical fact. So why they were not reclaimed again? Reclaimed. Of course, some of the sannyāsīs, they tried to reclaim, but that was not the proper way—therefore it was failure.
The proper way of reclaiming all the fallen souls: by Kṛṣṇa consciousness movement. Kṛṣṇa says, māṁ hi pārtha vyapāśritya. One has to be educated to take shelter of the lotus feet of Kṛṣṇa. Māṁ hi pārtha vyapāśritya. Not otherwise. You cannot propagate śuddhi movement by otherwise. You have to reclaim everyone to the Vedic platform by making him Vaiṣṇava. Because when one becomes Vaiṣṇava, he becomes transcendental. That is confirmed in the Bhagavad-gītā.