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Verses from the Upanishads
Here are two verses from the Chhandogya Upanishad, a text
composed in Sanskrit c. sixth century BCE :
The nature of the self
This self of mine within the heart, is smaller than paddy or barley
or mustard or millet or the kernel of a seed of millet. This self of mine
within the heart is greater than the earth, greater than the intermediate
space, greater than heaven, greater than these worlds.
The true sacrifice
This one (the wind) that blows, this is surely a sacrifice ... While
moving, it sanctifies all this; therefore it is indeed a sacrifice.