taṅ vidyād duḥkhasaṅyōgaviyōgaṅ yōgasaṅjñitam.
sa niścayēna yōktavyō yōgō.nirviṇṇacētasā৷৷6.23৷৷
श्रीमद् भगवद्गीता
6.23 Know this deliverance from association with misery to be Yoga. This Yoga must be practised with determination and with a mind free from despondency.
6.20 - 6.23 Where, through the practice of Yoga, the mind, which is subdued everywhere by such practice, 'rejoices', i.e., rejoices in surpassing felicity; and where, perceiving through Yoga 'the self (Atman)' by 'the mind (Atman)' one is delighted by the self and indifferent to all other objects; and where, through Yoga, one 'knows', i.e., experiences that infinite happiness which can be grasped only by the 'intellect' contemplating on the self, but is beyond the grasp of the senses; where, remaining in that Yoga, one does not 'swerve from that state,' because of the overwhelming happiness that state confers; having gained which, he desires for it alone, even when he is awakened from Yoga, and does not hold anything else as a gain; where one is not moved even by 'the heaviest sorrow' caused by any berevaement like that of a virtuous son - let him know that disunion from all union with pain, i.e., which forms the opposite of union with pain, is called by the term Yoga. This Yoga must be practised with the determination of its nature as such from the beginning with a mind free from despondency, i.e., with zestful exaltation.
6.20-23 Yatra etc. upto anirvinna-cetasa. Where the mind well restrained remains iet : i.e., on its own accord. Where he realises the limitless Bliss : Becuase the dirts created by the sense-objects are absent. Any other gain : the gain obtained through the close contacts with wealth. wives, childeren etc. The idea is : With regard to other objects, the notion of their being sources of pleasure disappears; and it is the nature of the thing in estion. Not shaken much : not shaken to a great extent; [hence] there is yet [a little] shaking in him, purely due to [former] mental impression; and it lasts only for a moment due to his compassion [towards all creatures], and not due to the wrong notions like 'Alas ! I am undone ! What is to done by me.' and so on. That, due to which the cessation of contact with misery results-that must be yoked i.e., practised (concentrated upon) by all means, with determination i.e., with faith, born of the belief [in the Self]. Of undepressed mind. i.e., because the goal has been reached. Or of depressed mind : i.e., depressed that the birth-and-death-cycle is very firm and is full of misery. The means for abandoning desire is to abandon intention. This (the Lord) says :
6.23. That he would realise to be the cause for [his] cessation of [his] contact with misery and to be the one made known by Yoga. With determination That is to be yoked in Yoga by a person of undepressed mind (or of the depressed mind).