She (Uma) said: "It is Brahman. It is through the victory of Brahman that ye are victorious." Then from her words, he (Indra) knew that it (that mysterious form) was Brahman.
Therefore these Devas,--Agni, Vayu and Indra--excel other Devas, because they came nearer to Brahman. It was they who first knew this spirit as Brahman.
अथाध्यात्मं यद्देतद्गच्छतीव च मनोऽनेन
चैतदुपस्मरत्यभीक्ष्णँ सङ्कल्पः
Next (the teaching) is regarding Adhyatman (the embodied Soul). The mind seems to approach Him (Brahman). By this mind (the seeker) again and again remembers and thinks about Brahman.
उपनिषदं भो ब्रूहीत्युक्ता त उपनिषद्ब्राह्मीं वाव त
उपनिषदमब्रूमेति
The disciple asked: O Master, teach me the Upanishad. (The teacher replied:) The Upanishad has been taught thee. We have certainly taught thee the Upanishad about Brahman.
The Upanishad is based on tapas (practice of the control of body, mind and senses), dama (subjugation of the senses), karma (right performance of prescribed actions). The Vedas are its limbs. Truth is its support.
यो वा एतामेवं वेदापहत्य पाप्मानमनन्ते स्वर्गे
लोके ज्येये प्रतितिष्ठति प्रतितिष्ठति
He who knows this (wisdom of the Upanishad), having been cleansed of all sin, becomes established in the blissful, eternal and highest abode of Brahman, in the highest abode of Brahman.