The Yoga and Sâṅkhya are mentioned together in the Śvetâśvatara Upanishad,[756] and the Bhagavad-gîtâ[757] says that he sees truly who sees them as one. The difference lies in treatment rather than in substance. Whereas the Sâṅkhya is mainly theoretical, the principal topic of the Yoga is the cultivation of that frame of mind which leads to emancipation and the methods and exercises proper to this end. Further, the Yoga recognizes a deity. This distinction may seem of capital importance but the god of the Yoga (called Îśvara or the Lord) is not its foundation and essence as Brahman is of the Vedânta.[758] Devotion to God is recognized as one among other methods for attaining emancipation and if this particular procedure, which is mentioned in relatively few passages, were omitted, the rest of the system would be unaffected. It is therefore probable that the theistic portions of the Yoga are an addition made under Brahmanic influence. But taking the existing Sûtras of the two philosophies, together with their commentaries, it may be said that the Yoga implies most of the Sâṅkhya theory and the Sâṅkhya most of the Yoga practice, for though it does not go into details it prescribes meditation which is to be perfected by regulating the breathing and by adopting certain postures. I have already spoken of the methods and discipline prescribed by the Yoga and need not dwell further on the topic now.
That Buddhism has some connection with the Sâṅkhya and Yoga has often been noticed.[759] Some of the ideas found in the Sâṅkhya and some of the practices prescribed by the Yoga are clearly anterior to Gotama and may have contributed to his mental development, but circumspection is necessary in the use of words like Yoga, Sâṅkhya and Vedânta. If we take them to mean the doctrinal systems contained in certain sûtras, they are clearly all later than Buddhism. But if we assume, as we may safely do, that the doctrine is much older than the manuals in which we now study it, we must also remember that when we leave the texts we are not justified in thinking of a system but merely of a line of thought. In this sense it is clear that many ideas of the Sâṅkhya appear among the Jains, but the Jains know nothing of the evolution of matter described by the Sâṅkhya manuals and think of the relation of the soul to matter in a more materialistic way. The notion of the separate eternal soul was the object of the Buddha's persistent polemics and was apparently a popular doctrine when he began preaching. The ascetic and meditative exercises prescribed by the Yoga were also known before his time and the Piṭakas do not hide the fact that he received instruction from two Yogîs. But though he was acquainted with the theories and practices which grew into the Yoga and Sâṅkhya, he did not found his religion on them for he rejected the idea of a soul which has to be delivered and did not make salvation dependent on the attainment of trances. If there was in his time a systematic Sâṅkhya philosophy explaining the nature of suffering and the way of release, it is strange that the Piṭakas contain no criticism of it, for though to us who see these ancient sects in perspective the resemblance of Buddhism to the Sâṅkhya is clear, there can be little doubt that the Buddha would have regarded it as a most erroneous heresy, because it proposes to attain the same objects as his own teaching but by different methods.
Sâṅkhya ideas are not found in the oldest Upanishads, but they appear (though not in a connected form) in those of the second stratum, such as the Śvetâśvatara and Kaṭhâ. It therefore seems probable, though not proven, that the origin of these ideas is to be sought not in the early Brahmanic schools but in the intellectual atmosphere non-theistic, non-sacerdotal, but audaciously speculative which prevailed in the central and eastern part of northern India in the sixth century B.C. The Sâṅkhya recognizes no merit in sacrifices or indeed in good works of any kind, even as a preliminary discipline, and in many details is un-Brahmanic. Unlike the Vedânta Sûtras, it does not exclude Śûdras from higher studies, but states that there are eight classes of gods and five of animals but only one of men. A teacher must have himself attained emancipation, but there is no provision that he must be a Brahman. Perhaps the fables and parables which form the basis of the fourth book of the Sâṅkhya Sûtras point to some more popular form of instruction similar to the discourses of the Buddha. We may suppose that this ancient un-Brahmanic school took shape in several sects, especially Jainism and Buddhism, and used the Yoga discipline. But the value and efficacy of that discipline were admitted almost universally and several centuries later it was formulated in the Sûtras which bear the name of Patañjali in a shape acceptable to Brahmans, not to Buddhists. If, as some scholars think, the Yoga sûtras are not earlier than 450 A.D.[760] it seems probable that it was Buddhism which stimulated the Brahmans to codify the principles and practice of Yoga, for the Yogâcâra school of Buddhism arose before the fifth century. The Sâṅkhya is perhaps a somewhat similar brahmanization of the purely speculative ideas which may have prevailed in Magadha and Kosala.[761] Though these districts were not strongholds of Brahmanism, yet it is clear from the Piṭakas that they contained a considerable Brahman population who must have been influenced by the ideas current around them but also must have wished to keep in touch with other Brahmans. The Sâṅkhya of our manuals represents such an attempt at conciliation. It is an elaboration in a different shape of some of the ideas out of which Buddhism sprung but in its later history it is connected with Brahmanism rather than Buddhism. When it is set forth in Sûtras in a succinct and isolated form, its divergence from ordinary Brahmanic thought is striking and in this form it does not seem to have ever been influential and now is professed by only a few Pandits, but, when combined in a literary and eclectic spirit with other ideas which may be incompatible with it in strict logic, it has been a mighty influence in Indian religion, orthodox as well as unorthodox. Such conceptions as Prakṛiti and the Guṇas colour most of the post-Vedic religious literature. Their working may be plainly traced in the Mahâbhârata, Manu and the Purâṇas,[762] and the Tantras identify with Prakṛiti the goddesses whose worship they teach. The unethical character of the Sâṅkhya enabled it to form the strangest alliances with aboriginal beliefs.
3
Unlike the Sâṅkhya, the Vedânta is seen in its most influential and perhaps most advantageous aspect when stated in its most abstract form. We need not enquire into its place of origin for it is clearly the final intellectual product of the schools which produced the Upanishads and the literature which preceded them, and though it may be difficult to say at what point we are justified in applying the name Vedânta to growing Brahmanic thought, the growth is continuous. The name means simply End of the Veda. In its ideas the Vedânta shows great breadth and freedom, yet it respects the prejudices and proprieties of Brahmanism. It teaches that God is all things, but interdicts this knowledge to the lower castes: it treats rites as a merely preliminary discipline, but it does not deny their value for certain states of life.
The Vedânta is the boldest and the most characteristic form of Indian thought. For Asia, and perhaps for the world at large, Buddhism is more important but on Indian soil it has been vanquished by the Vedânta, especially that form of it known as the Advaita. In all ages the main idea of this philosophy has been the same and may be summed up in the formula that the soul is God and that God is everything. If this formula is not completely accurate[763]—and a sentence which both translates and epitomizes alien metaphysics can hardly aspire to complete accuracy—the error lies in the fact to which I have called attention elsewhere that our words, God and soul, do not cover quite the same ground as the Indian words which they are used to translate.
Many scholars, both Indian and European, will demur to the high place here assigned to the Advaita philosophy. I am far from claiming that the doctrine of Śaṅkara is either primitive or unchallenged. Other forms of the Vedânta existed before him and became very strong after him. But so far as a synthesis of opinions which are divergent in details can be just, he gives a just synthesis and elaboration of the Upanishads. It is true that his teaching as to the higher and lower Brahman and as to Mâyâ has affinities to Mahayanist Buddhism, and that later sects were repelled by the severe and impersonal character of his philosophy, but the doctrine of which he is the most thorough and eminent exponent, namely that God or spirit is the only reality and one with the human soul, asserts itself in almost all Hindu sects, even though their other doctrines may seem to contradict it.
This line of thought is so persistent and has so many ramifications, that it is hard to say what is and what is not Vedânta. If we take literature as our best guide we may distinguish four points of importance marked by the Upanishads, the Brahma-Sûtras, Śaṅkara and Râmânuja.
I have said something elsewhere of the Upanishads. These works do not profess to form a systematic whole (though later Hinduism regards them as such) and when European scholars speak of them collectively, they generally mean the older members of the collection. These may justly be regarded as the ancestors of the Vedânta, inasmuch as the tone of thought prevalent in them is incipient Vedântism. It rejects dualism and regards the universe as a unity not as plurality, as something which has issued from Brahman or is pervaded by Brahman and in any case depends on Brahman for its significance and existence. Brahman is God in the pantheistic sense, totally disconnected with mythology and in most passages impersonal. The knowledge of Brahman is salvation: he who has it, goes to Brahman or becomes Brahman. More rarely we find statements of absolute identity such as "Being Brahman, he goes to Brahman."[764] But though the Upanishads say that the soul goes to or is Brahman, that the world comes from or is Brahman, that the soul is the whole universe and that a knowledge of these truths is the one thing of importance, these ideas are not combined into a system. They are simply the thoughts of the wise, not always agreeing in detail, and presented as independent utterances, each with its own value.