What Vidyaranya has accomplished in this independent work is bestdescribed as a
'meta-commentary', being not a mere gloss on theexisting commentary, but an
independent exercise in interpretationof the Upanisads themselves guided at
every step by the turns inthe commentary of Sankaracarya. The 'commentary' on
theTaittiriyopanisad is entitled Taittiriyaka-vidya-prakasah, that is'the
exposition of the teaching of the Taittiriyopanisad'. It is tobe seen that
almost all Upanisads propound the unity of the Selfwith Brahman in two ways,
firstly by negation and secondly by themode of indicative descriptions. Both
these methods are to be metwith in the Taittiriyopanisad.