To me, the last stanza references the idea that you are only in possession of the truth if you are silent. Any concept which can be conceived has a logical opposite, for duality is inherently necessary to formulate concepts, so if you think you "know" something by having some concept floating in your head, you are really creating cognitive dissonance and have strayed from true knowledge. The "something else" is something else to life, to the universal experience, other than the incessant stream of abstract input. The resulting power that one has when they are silent is the power of timelessness, the power to direct the primal action principle of the universal towards any manifested potential at this moment.
To me, the last stanza references the idea that you are only in possession of the truth if you are silent. Any concept which can be conceived has a logical opposite, for duality is inherently necessary to formulate concepts, so if you think you "know" something by having some concept floating in your head, you are really creating cognitive dissonance and have strayed from true knowledge. The "something else" is something else to life, to the universal experience, other than the incessant stream of abstract input. The resulting power that one has when they are silent is the power of timelessness, the power to direct the primal action principle of the universal towards any manifested potential at this moment.