This too is what Buddha did (or forebore to do). That he kept silence about "great matters" is as certain as that his ethical teaching was clear, coherent, and systematic.
The coincidences between the two schemes of life--that which Buddha taught and that which follows logically (in the deeper sense of the word) from the philosophy of the Upanishads--are so many and so vital that they cannot be ascribed to chance. Even if the age in which Buddha lived had been separated by a thousand years from the age which gave birth to the stories of Brahma and the Gods, and Nachiketas and Death, we should feel justified, on internal evidence, in concluding that Buddha had somehow or other come under the influence of the ideas which those stories enshrined. But we need not trust to internal evidence only. We know that the spiritual atmosphere of India in Buddha's day was impregnated with the ideas of the Upanishads. We know that those ideas must have appealed with peculiar force to a thinker of Buddha's exalted nature, whether he ended by emancipating himself from their influence or not. We know that the teachers who had expounded those ideas had utterly failed to bring them into connection with the daily life of the ordinary man, and had thereby left a gap in the philosophical teaching of India, which was waiting to be filled by some master mind. The cumulative evidence afforded by these facts, added to the internal evidence which has already been set forth in detail, seems to point with irresistible force to one conclusion, namely that Buddha accepted the idealistic teaching of the Upanishads--accepted it at its highest level and in its purest form--and took upon himself as his life's mission to fill the obvious gap in it,--in other words, to make the
spiritual ideas which had hitherto been the exclusive possession of a few select souls, available for the daily needs of mankind.
If this conclusion is correct, we shall see in Buddhism, not a revolt against the "Brahmanic" philosophy as such, but an ethical interpretation of the leading ideas of that philosophy,--a following out of those ideas, not into the word-built systems of (so-called) thought which the metaphysicians of the day were constructing with fatal facility, but into their practical consequences in the inner life of man.