X-posting from off-topic thread:
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RamaY wrote:^ ayyo. I am nothing sir.
RajeshAji
RajeshA wrote:johneeG ji,
as of now I see two original Mathas in favor of 507 BCE date, so I'll go with them. If anything changes on that front, may be I could revise my thoughts on it.
I just think that if Buddha's age was 1887 BCE - 1807 BCE, then 2675 years till Adi Shankara was born (789 CE) is too long a time for Buddhism to go unchallenged. 1380 years seem more like it.
This thread is however not the right place to have a detailed discussion on the subject. Perhaps the subject can be discussed elsewhere.
It is possible that Buddhism went unchallenged till 8th century AD. One reason is the existence of Buddhist kings (Satavahanas) in Andhra area between 230bc - 200ad.
Adi Samkara removed Buddhism completely from entire India.
Perhaps the lack of data on kings meeting Samkara can be attributed to the chaos persisted in his time which resulted in Islamic invasions?
Whether right or wrong, the Buddhist kings and populate had an understanding till that time. But when Adi Samkara pulled the public plug from the buddhist kings, their legitimacy was gone?
Just a thought. Perhaps members with better historical knowledge can throw some light..
Saar,
According to Chandrashekarendra Saraswati of Kanchi:
Many believe that Buddhism ceased to have a large following in India because it came under the attack of Sankara. This is not true. There are very few passages in the Acarya's commentaries critical of that religion, a religion that was opposed to the Vedas. Far more forcefully has he criticised the doctrines of Sankhya and Mimamsa that respect the Vedic tradition. He demolishes their view that Isvara is not the creator of the world and that it is not he who dispenses the fruits of our actions. He also maintains that Isvara possesses the laksanas or characteristics attributed to him by the Vedas and the Brahmasutra and argues that there can be no world without Isvara and that it is wrong to maintain that our works yield fruits on their own. It is Isvara, his resolve, that has created this world, and it is he who awards us the fruits of our actions. We cannot find support in his commentaries for the view that he was responsible for the decline of Buddhism in India.
Then how did Buddhism cease to have a considerable following in out country? Somebody must have subjected it to such rigorous attack as to have brought about its decline in this land. Who performed this task? The answer is the mimamsakas and the tarkikas. Those who are adept in the Tarka-sastra(logic) are called tarkikas. The Tarka is the part of Nyaya which is one of the fourteen branches of Vedic learning and which comes next to Mimamsa. People proficient in Nyaya are naiyayikas; those well versed in grammar are "vaiyakaranis"; and those proficient in the Puranas are "pauranikas".
Udayanacarya, the tarkika, and Kumarilabhatta, the mimamsaka, opposed Buddhism for different reasons. The former severely criticised that religion for its denial of Isvara. To mimamsakas, as I have said earlier, Vedic rituals are of the utmost importance. Even though they don't believe that it is Isvara who awards us the fruit of our actions, they believe that the rituals we perform yield their own fruits and that the injunctions of the dharmasastras must be carried out faithfully. They attacked Buddhism for its refusal to accept Vedic rituals. Kumarilabhatta has written profusely in criticism of that religion. He and Udayanacarya were chiefly responsible for the failure of Buddhism to acquire a large following in this country. Our Acarya came later and there was no need for him to make a special assault on that religion on his own. On the contrary, his chief task was to expose the flaws in the systems upheld by the very opponents of Buddhism, Kumarilabhatta and Udayanacarya. He established that Isvara is the creator of the universe and that it is he who awards the fruits of our actions.
I am mentioning this fact so as to disabuse you of the wrong notions you must have formed with regard to Sankara's role in the decline of Buddhism.
There is a special chapter in one of Kumarilabhatta's works called "Tarkapadam" in which he has made an extensive refutation of Buddhism. So too has Udayanacarya in his Bauddhadhikaram. These two acaryas were mainly responsible for the decline of Buddhism in our land and not Sankara Bhagavatpada. What we are taught on the subject in our textbooks of history is not true.
In my opinion at no time in our history did Buddhism in the fullest sense of that religion have a large following in India. Today a number of Hindus, who are members of the Theosophical Society, celebrate our festivals like other Hindus and conduct marriages in the Hindu way. There are many devotees of Sri Ramakrsna Parmahamsa practising our traditional customs. Sri C. Ramanujacariyar, "Anna" (Sri N. Subramanya Ayyar) and some others are intimately associated with the Ramakrsna Mission but they still adhere to our traditional beliefs.
When great men make their appearance people are drawn to them for their qualities of compassion and wisdom. In the organisations established after them our sanatana dharma is followed with some changes. But a large number of the devotees of these men still follow the old customs and traditions in their homes.
Many regard Gandhiji as the founder almost of a new religion (Gandhism), and look upon him as one greater than avataras like Rama and Krsna. 
But in their private lives few of them practise what he preached- for instance, widow marriage, mixing with members of other castes, and so on. People developed esteem for Gandhiji for his personal life of self-sacrifice, truthfulness, devotion and service to mankind. But applying his ideas in actual life was another matter.
It was in the same way that the Buddha had earned wide respect for his lofty character and exemplary personal life. "A prince renounces his wife and child in the prime of his youth to free the world from sorrow": the story of Siddhartha, including such accounts, made an impact on people. They were moved by his compassion, sense of detachment and self-sacrifice. But it did not mean that they were ready to follow his teachings. They admired the Buddha for his personal qualities but they continued to subscribe to the varnasrama system and the ancient way of religious life with its sacrifice and other rites. Contrary to what he wished, people did not come forward in large numbers to become monks but continued to remain householders adhering to Vedic practices.
Emperor Asoka did much to propagate Buddhism; but in society in general the Vedic dharma did not undergo any change. Besides, the emperor himself supported the varnasrama dharma as is evident from his famous edicts. But for the Buddhist bhiksus(monks), all householders followed the Vedic path. Though they were silent on the question of Isvara and other deities, some book written by great Buddhist monks open with hymns to Sarasvati. They also worshipped a number of gods. It is from Tibet that we have obtained many Tantrik works relating to the worship of various deities. If you read the works of Sriharsa, Bilhana and so on in Sanskrit, and Tamil poetical works like that of Ilango Adigal, you will realise that even during times when Buddhism wielded influence in society, Vedic customs and varnasrama were followed by the generality of people.
Reformists today speak in glowing terms about Vyasa, Sankaracarya, Ramanujacarya and others. But they do not accept the customs and traditions I ask people to follow. Some of them, however, come to see me. Is it not because they feel that there is something good about me, because they have personal regard for me, even though they do not accept my ideas? Similarly, great men have been respected in this country for their personal qualities and blameless life notwithstanding the fact they advocated views that differed slightly from the Vedic tradition or were radically opposed to it. Our people any way had long been steeped in the ancient Vedic religion and its firmly established practices and, until the turn of the century, were reluctant to discard the religion of their forefathers and the vocations followed by them. Such was our people's attitude during the time of the Buddha also. When his doctrines came under attack from Udayanacarya and Kumarilabhatta even the few who had first accepted them returned to the Vedic religion.
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People, at large, did not formally convert to Buddhism nor did they completely follow the Vedic religion(or Hinduism). For eg: today, many Hindus follow secularism(christianity without church) or sarva-dharma-samabhava(all religions equal equal). That means, they go to temples, churches, masjids, dargahs, ...etc. They celebrate new year day and valentines' day with great gusto. Yet, they have not completely abandoned the Hinduism. They follow it but customize it to suit their convenience and sensitivities. Similarly, at that time, people were enamored by Buddhism. People acknowledged the validity and superiority of Buddhism. But, that does not mean they completely abandoned the Hinduism and formally converted to Buddhism. It just means that they now made variations in their Hindu rituals and started praying to Buddha's image also(as if they were praying to Rama or Krishna). The ordinary people never understood the intricate philosophies of various Buddhist schools. But, they understood that the elites and the intellectuals had accepted the Buddhist views as a superior to Vedic ones. So, the masses followed the lead of elites and intellectuals.
The courts and assemblies of Kings(and other cultural venues) were dominated by the intellectuals who were ardent votaries of one or the other Buddhist philosophies. Therefore, invariably, the political power was wielded by the Buddhism. This phenomenon is very similar to how 'eminent' historians wield power in India. Yatha raja, thatha praja. The major educational centers were also under the grip of Buddhists. For eg: Takshashila and Nalanda were Buddhist centers as much as they were great educational centers. This is similar to how JNU or OU are under the grip of commies today.
All this control on various choke points of society allowed various Buddhist schools to disseminate their views into public effectively. Since all the intellectuals, elites and power were already wedded to Buddhism, there was no major coherent intellectual opposition to their views. These views were considered to be 'scientific' and those who disagreed were seen as 'superstitious'.
The major thrust of all these philosophies was against Vedas. Vedas were specifically chosen as special targets. Vedas were, rightly, understood to be the fundamentals of Hinduism. So, invalidating the Vedas was seen as the best and most effective way of countering Hinduism. The version of Buddhism that was practiced by the general masses(who were still nominally Hindus), was more or less similar to Hinduism(with some variations). The various schools of Buddhism differed from each other as much as they differed from Hinduism. The one thing that united all Buddhists was 'Buddha', while the one thing that united all Hindus was Vedas. While, the one thing that differentiated the Buddhists from Hindus was(and is) Vedas. So, it was only natural that Vedas were the target of Buddhists. This is similar to how the christians criticize the belief in Mohammad, but not other aspects of Islam.
So, the Buddhists attacked Vedas. Given their social, political and economical power, their arguments easily prevailed. These attacks were also quite intellectual and intelligent. So, the common masses had no counter to them but to accept them. At one point, Vedas were so maligned that they virtually became a word to be abused. Sri Bharathi Theertha of Sringeri once said that things had come to such a pass at that time that if anyone uttered the word Veda, then others would remark, 'chi, chi'...
Such attitudes can be seen today also. Some people are so taken in by AIT, commies, secularism, or something else and hate Vedas, even though they are still nominally Hindus. At that time, this attitude was more widely spread.
There is one more point. Buddhists studied the Hinduism and were aware of Hindu beliefs and views. Even otherwise, everyone and his aunt knew about elementary Hinduism. This allowed them to make arguments against Hindu beliefs and views. Ridicule these beliefs/views and malign them. On the other hand, Hindus(masses and intellectuals) were not aware of the intricacies of various Buddhist schools and their exact views on various topics. This lack of knowledge was a serious impediment in forming a coherent retort to the Buddhist attack on Hinduism.
This lack of knowledge was not necessarily the fault of Hindus. This was a Buddhist strategy. Buddhist schools believed that all the masses were not equiped to understand the high philosophical points. So, they had to be told what they could grasp. If they could be made to believe in Buddha, that was enough for them. Only those who had the intellectual capacity to understand the philosophy should be given the philosophical details, that too only after checking that he will not divulge these secrets to general masses. So, there were two versions that were pouted by Buddhists: one version was for the consumption of gullible general masses and another version was the actual philosophy. The version for the general masses was varied to suit the tastes of listening audience. The primary point was to create faith in Buddha. How that was achieved was beside the point. The actual philosophy was only told to those who had proven their 'loyalty'.
Saddharma-Pundarika Sutram(or Lotus Sutra), a buddhist missionary manual(considered to be written before 200 AD), lays down these points for the buddhist missionaries. This method was used to devastating effect by the buddhist missionaries to spread buddhism far and wide throughout the world in various disguises. At each place(or time-period), it was customized to suit the audience. I think Europe could not have stayed out of the radar of the Buddhist missionaries. Particularly Greece may have been the prime target where Buddhism could be mixed with the prevailing Hellenism for wide dissemination.
Christian Lindtner showcases this behaviour and connects it with the Jesus NT tales and says that like many other tales, Jesus tale is also a crypto-Buddhist missionary tale where Jesus ids the Buddha in disguise.
Thus, it was a well-thought out strategy of the Buddhists to keep their real philosophy secret while using all tricks to lure the people into keeping faith in Buddha. So, it was very difficult to form actual refutation of Buddhists philosophies which held sway in intellectual assemblies and royal courts while the masses were in the kept in thrall of Buddha.
The masses indulged in the ritualistic worship of images of Buddha which were made of costly metals and materials. This worship was carried out in great pomp and splendour. In many ways, it was nothing more than a corrupted form of Vedic rituals where Buddha was given a pre-eminent position. Huge, I mean really huge images of Buddha were installed. Here is a good article on image worship of Buddha.
Link
Viharas started springing up all over the place. They were also built in gigantic proportions in a very rich manner. Buddhist Viharas, which were supposed to be residence for 'beggar' monks, became centers with great economic and political power apart from social influence. Very much similar to the modern day Sanyasis and their 'ashrams'.
The elites who supported Buddhism, lived a luxurious life in their mansions with several slaves.
There was urgent need for a Hindu revival lest the Hinduism be digested by Buddhism.
At such a time, Kumarilla Bhatta and Udayanacharya appeared. They presented arguments refuting the Buddhist arguments and supporting the Vedas and Hindu beliefs. Kumarilla even studied in Nalanda specifically to learn about actual position of Buddhist philosophies, so that he could counter them. Armed with this knowledge, Kumarilla demolished the Buddhist philosophies and reasserted the Hindu position about pre-eminence of Vedas. Thanks to these efforts, masses reverted to Hindu rituals and abandoned their infatuation of Buddha along with Buddhist philosophies.
But, that does not mean, the Buddhists stopped existing. They continued to have pockets of control(just as today). But, they lost their absolute dominance. Moreover, Vedas regained respect in the eyes of the ordinary people.
However, there was a side-effect to this. After the decline(not elimination) of Buddhism, Hinduism saw an explosion in newer sects. Each sect holding that its own view was correct and backed by Vedas. Another effect was that Hinduism became dogmatic with excessive emphasis on rituals(to the extent that some schools denied the existence of God). Soon, there were sectarian divisions. The Vedantic portion of Vedas was ignored and only the Purva Mimamsa was given importance.
It is at such a time that Adi Shankara appeared and reasserted the Vedanta without undermining the Purva Mimamsa. He also emphasized on all the Shan Matas(6 paths) of Hinduism that are agreed by Vedas. They are: Shiva, Vishnu, Devi, Ganapati Skandha and Surya. These 6 can be worshiped as the ultimate God/Goddess(Eshwara) according to the Hinduism. Any other figure is not suitable. Disparaging any of these 6 is prohibited. He toured entire India thrice on foot and restored the right practiced in several temples apart from refuting all kinds of sects and sub-sects(Hindu, Buddhist and Jaina). He wrote commentaries on Brahma Sutras, Upanishad, Bhagavad Gita and Vishnu Sahasranama. He authored Shiva Ananda Lahari and Soundarya Lahari. He wrote many long and short Vedantic works for various audience. He established 4 monastries in 4 directions of India(which proves beyond doubt that India was considered a single country long before the advent of muslims or british). These monastries became important centers to protect the Hinduism during long foreign invasions by the muslims and british.
It seems to me that only after Adi Shankara wrote commentaries, some of these scriptures became popular(or re-popular after the long Buddhist interval). Perhaps, that was one reason to write commentaries on these scriptures. After Him, all sorts of people(specially would be philosophies) wrote commentaries on these scriptures.
But, the buddhists continued to survive with some of the followers being elite and powerful. Hoever, the masses were now firmly established in Hinduism(with both Purva and Uttara Mimamsa). It seems to me that even the Kings were not pro-buddhists as in the past. So, Buddhists were relegated to their Viharas. At this time, the muslims started their invasions.
The idol destroying Ghazis were attracted to the rich Viharas and huge images of Buddha. This was the last nail in the coffin for Buddhism in India.
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There is a misconception that Buddhism is against caste. It does not seem to be true. I don't know how to say this, but it seems that the stress of caste/Kula was so much that they were prepared to commit incest rather than marry outside Kula(more specifically Kshatriya).
In several places in the Pāli Canon, including the Ambaṭṭha Sutta (D.i.92), the progenitors of the Śākyas are related to King Okkāka. Pāli Okkāka is identified with the Sanskrit Ikṣvāku, who is known from Purāṇic stories, and in Jainism he is an ancestor to all of the Tirthaṅkaras. The king banishes his elder brothers from his kingdom and they make their home on the slopes of the Himalayas. But they can find no one suitable to marry, so they take their own sisters as wives, and these incestuous relationships give birth to the Śākyas. Given the prejudice against incest in India society generally it is remarkable that this detail was preserved, and this suggests that it might have a grain of truth. If so it points to Iran "there is good evidence for this practice called xᵛaētuuadaθa, so-called next-of-kin or close-kin marriage."
Wiki Link
As you can see, they believed incest was better than marriage outside caste. In fact, they continued to believe that they were progeny of pure castes.
This incest in Buddhism had curious effect. They justified it through their theology by ascribing this behaviour to many other figures in their theology. But, most of the figures in Buddhism were borrowed from Hinduism. So, essentially, Buddhism redefined these figures and some of them were ascribed incest to justify their own incestous behaviour.
For ex:
In the Udaya Jataka the Bodhisattva is a prince who is compelled to marry his half-sister. Although the two sleep in the same room for many years they remain celibate (Ja.IV,105). In the Dasaratha Jataka the princes Rama and Lakkhana marry their sister (Ja.IV,130). As with many ancient peoples the Sakyans, the tribe the Buddha belonged to, had a myth about their origins which included brother-sister incest. When the Koliyans were involved in a dispute with the Sakyans they taunted them by sayings that they ‘cohabite with their sisters like dogs, jackals and other animals’ (Ja.V,413). During the Buddha’s life there was an incident where a nun became infatuated with her son who was a monk and had sex with him, an offence entailing expulsion from the Sangha (Vin.III,35). When this was brought to the Buddha’s attention he said, ‘Does not this foolish man know that a mother shall not lust after her son or a son after his mother?’
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So, Buddhists created a version of Ramayana where Sita is both the sister and wife of Rama. All this for what?! Caste! It is ironic since, according to Valmiki Ramayana, Rama killed Vali for committing incest with his sister-in-law. Rama explains that a sister-in-law is equivalent to one's daughter and should never be thought of as wife material. And the only punishment for such incest is death. If incest with sister-in-law in punishable by death, then what is the punishment for incest with sister?
But, all that is irrelevant when one has an agenda. So, Buddhists tarnish Rama to justify their incest.
There is another example: Brahma and Saraswathi relationship is presented as incest in Buddhism. Abraham and Sarah are most probably derived from this presentation of Buddhists.
Abraham's Incestuous Marriage with Sarah
Without knowing this, some anti-Hindu morons latch on to this Buddhist presentation.
AFAIK, Hinduism does not agree with this portrayal of these figures(Rama, Sita, Brahma, Saraswathi,... etc). One must understand that just because the names of these personalities are same in Hinduism and Buddhism does not mean their deeds, definitions and portrayals will also be same.
Thats why one must not try to think that all 'dharmas'(indic or foreign) are same.