यो मामेवमसम्मूढो जानाति पुरुषोत्तमम् ।
स सर्वविद्भजति मां सर्वभावेन भारत ॥ १५.१९ ॥

yo mām-evam-asammūḍho jānāti puruṣottamam |
sa sarva-vid-bhajati māṁ sarva-bhāvena bhārata || 15.19 ||

Once this understanding becomes firm, unshakeable and wholesome, that would mark the end of all search, doubt and agitation. He, who has gained this kind of fruition and fulfillment, becomes the all-knower. For him nothing else is there to be known.

Such a Knower has sensed and realized the ultimate essence of all creation, the one substratum of all existence. This wholesome knowledge of the Supreme makes him a wholesome worshipper too.

His worship, if at all, is no more partial or piecemeal. No more does he distinguish between worship and non-worship. For him there is nothing secular either. Everything becomes religious, divine, spiritual and yogic. Within him is the Supreme and surrounding him is Its magnificence and splendour. There is no fall or rise for such a one – religiously, spiritually, philosophically or in yoga.

Of course, Krishna has spoken about such a stable, wholesome, inner spiritual state in the second chapter while describing the sthita-prajña and sthita-dhīḥ.

This is the Brāhmic state, gaining which one is no more deluded. Ever established in it, one attains Brahma-nirvāṇa.

The key to everything is in one’s own within. The world is not as much an external creation, as it is an outcome of one’s own wakeful state. Mind is above matter. It is an expression of Consciousness. Consciousness, cit is sat and ānanda. Sat, cit and ānanda go together, to make the Saccidānanda, the Reality.