6.23 Vidyat, one should know; tat, that; duhkha-samyoga-viyogam, severance (viyoga) of contact (samyoga) with sorrow (duhkha); to be verily yoga-sanjnitam, what is called Yoga-i.e. oen should know it through a negative definition.
After concluding the topic of the result of Yoga, the need for pursuing Yoga is again being spoken of in another way in order to enjoin 'preservance' and 'freedom from depression' as the disciplines for Yoga: Sah, that; yogah, Yoga, which has
the results as stated above; yoktavyah, has to be practised; niscayena, with perservance; and anirvinnacetasa, with an undepressed heart. That which is not (a) depressed (nirvinnam) is anirvinnam. What is that? The heart. (One has to practise Yoga) with that heart which is free from depression. This is the meaning.
Again,