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class of works a wide geographical area may be represented; by the Br[ra]hmanas, west and east; by the S[ru]tras, north and south; by the Vedic poems, northwest and east to Benares (AV.); by the epics, all India, centred about the holy middle land near
Delhi.
The meaning of Upanishad as used in the compositions themselves, is either, as it is used to-day, the title of a philosophical work; that of knowledge derived from esoteric teaching; or the esoteric teaching itself. Thus brahma upanishad is the secret doctrine of brahma, and 'whoever follows this upanishad means whoever follows this doctrine. This seems, however, to be a meaning derived from the nature of the Upanishads themselves, and we are almost inclined to think that the true significance of the word was originally that in which alone occurs, in the early period, the combination upa-ni[s. Jad, and this is purely external: "he makes the common people upa-ni-s(=aldin," i.e., 'sitting below' or 'subject,' it is said in Çat. Br. ix. 4. 3. 3 (from the literal meaning of 'sitting below').[5] Instead, therefore, of seeing in upan[=ijsad, Upanishad, the idea of a session, of pupils sitting down to hear instruction (the prepositions and verb are never used in this sense), it may be that the Upanishads were at first subsidiary works of the ritualistic Br[=a]hmanas contained in the (=A]ranyakas or Forest Books, that is, appendices to the Br[ra]hmana, ostensibly intended for the use of pious forest-hermits (who had passed beyond the need of sacrifice); and this, in point of fact, is just what they were; till their growth resulted in their becoming an independent branch of literature. The usual explanation of 'Upanishad,' however, is that it represents the instruction given to the pupil 'sitting under the teacher.
Although at present between two and three hundred Upanishads are known, at least by name, to exist, yet scarcely a dozen appear to be of great antiquity. Some of these are integral parts of Br[=a]hmanas, and apparently were added to the ritualistic works at an early period.[6]
While man's chief effort in the Brahmanic period seems to be by sacrifice and penance to attain happiness hereafter, and to get the upper hand of divine powers; while he