Verse 5·26

कामक्रोधवियुक्तानां यतीनां यतचेतसाम् ।अभितो ब्रह्मनिर्वाणं वर्तते विदितात्मनाम् ॥

kāmakrodhaviyuktānāṃ yatīnāṃ yatacetasāmabhito brahmanirvāṇaṃ vartate viditātmanām

This is clearly a large extension of the idea of Nirvana. Freedom from all stain of the passions, the self-mastery of the equal mind on which that freedom is founded, equality to all beings and beneficial love for all, final destruction of that doubt and obscurity of the ignorance which keeps us divided from the all-unifying Divine and the knowledge of the One Self within us and in all are evidently the conditions of Nirvana which are laid down in these verses of the Gita, go to constitute it and are its spiritual substance. …Therefore by Nirvana in the Brahman must be meant a destruction or extinction of the limited separative consciousness, falsifying and dividing, which is brought into being on the surface of existence by the lower Maya of the three gunas, and entry into Nirvana is a passage into this other true unifying consciousness which is the heart of existence and its continent and its whole containing and supporting, its whole original and eternal and final truth. Nirvana when we gain it, enter into it, is not only within us, but all around, abhito vartate, because this is not only the Brahman-consciousness which lives secret within us, but the Brahman-consciousness in which we live. It is the Self which we are within, the supreme Self of our individual being but also the Self which we are without, the supreme Self of the universe, the self of all existences. By living in that self we live in all, and no longer in our egoistic being alone; by oneness with that self a steadfast oneness with all in the universe becomes the very nature of our being and the root status of our active consciousness and root motive of all our action.