The Vedânta sûtras, also called Uttara Mîmâ@msâ, written by Bâdarâya@na, otherwise known as the Brahma-sûtras, form the original authoritative work of Vedânta. The word Vedânta means "end of the Veda," i.e. the Upani@sads, and the Vedânta sûtras are so called as they are but a summarized statement of the general views of the Upani@sads. This work is divided into four books or adhyâyas and each adhyâya is divided into four pâdas or chapters. The first four sûtras of the work commonly known as Catu@hsûtrî are (1) How to ask about Brahman, (2) From whom proceed birth and decay, (3) This is because from him the Vedas have come forth, (4) This is shown by the harmonious testimony of the Upani@sads. The whole of the first chapter of the second book is devoted to justifying the position of the Vedânta against the attacks of the rival schools. The second chapter of the second book is busy in dealing blows at rival systems. All the other parts of the book are devoted to settling the disputed interpretations of a number of individual Upani@sad texts. The really philosophical portion of the work is thus limited to the first four sûtras and the first and second chapters of the second book. The other portions are like commentaries to the Upani@sads, which however contain many theological views of the system. The first commentary of the Brahma-sûtra was probably written by Baudhâyana, which however is not available now. The earliest commentary that is now found is that of the great S'a@nkara. His interpretations of the Brahma-sûtras together with all the commentaries and other works that follow his views are popularly known as Vedânta philosophy, though this philosophy ought more properly to be called Vis'uddhâdvaitavâda school of Vedânta philosophy (i.e. the Vedânta philosophy of the school of absolute monism). Variant forms of dualistic philosophy as represented by the Vai@s@navas, S'aivas, Râmâyatas, etc., also claim to express the original purport of the Brahma sûtras. We thus find that apostles of dualistic creeds such as Râmânuja, Vallabha, Madhva, S'rîka@n@tha, Baladeva, etc., have written independent commentaries on the Brahma-sûtra to show that the philosophy as elaborated by themselves is the view of the Upani@sads and as summarized in the Brahma-sûtras. These differed largely and often vehemently attacked S'a@nkara's interpretations of the same sûtras. These systems as expounded by them also pass by the name of Vedânta as these are also claimed to be the real interpretations intended by the Vedânta (Upani@sads)
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and the Vedânta sûtras. Of these the system of Râmânuja has great philosophical importance.
The Nyâya sûtras attributed to Gautama, called also Ak@sapâda, and the Vais'e@sika sûtras attributed to Ka@nâda, called also Ulûka, represent the same system for all practical purposes. They are in later times considered to differ only in a few points of minor importance. So far as the sûtras are concerned the Nyâya sûtras lay particular stress on the cultivation of logic as an art, while the Vais'e@sika sûtras deal mostly with metaphysics and physics. In addition to these six systems, the Tantras had also philosophies of their own, which however may generally be looked upon largely as modifications of the Sâ@mkhya and Vedânta systems, though their own contributions are also noteworthy.
Some fundamental Points of Agreement.
I. The Karma Theory.
It is, however, remarkable that with the exception of the Cârvâka materialists all the other systems agree on some fundamental points of importance. The systems of philosophy in India were not stirred up merely by the speculative demands of the human mind which has a natural inclination for indulging in abstract thought, but by a deep craving after the realization of the religious purpose of life. It is surprising to note that the postulates, aims and conditions for such a realization were found to be identical in all the conflicting systems. Whatever may be their differences of opinion in other matters, so far as the general postulates for the realization of the transcendent state, the summum bonum of life, were concerned, all the systems were practically in thorough agreement. It may be worth while to note some of them at this stage.
First, the theory of Karma and rebirth. All the Indian systems agree in believing that whatever action is done by an individual leaves behind it some sort of potency which has the power to ordain for him joy or sorrow in the future according as it is good or bad. When the fruits of the actions are such that they cannot be enjoyed in the present life or in a human life, the individual has to take another birth as a man or any other being in order to suffer them.
The Vedic belief that the mantras uttered in the correct accent at the sacrifices with the proper observance of all ritualistic
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