Although the devotees know these two paths, O Arjuna, they are never bewildered. Therefore be always fixed in devotion.
Author Name:-Sri Ramanuja
Purport
Sri Ramanuja
8.26 The bright path is characterised by the terms ‘starting with light.’ The dark path is characterised by the ‘terms starting with smoke.’ By the bright path a man goes to the plane of no-return, but he who goes by the dark path returns again. In the Sruti both the bright and dark paths are said to be eternal in relation to Jnanis and doers of good actions of many kinds. This is corroborated in the text: ‘Those who know this and those who worship with faith do Tapas in the forest etc., they go to the light’ (Cha. U., 5.10.1), and ‘But those who in the village perform Vedic and secular acts of a meritorious nature and the giving of alms — they pass to the smoke’ (ibid., 5.10.3).
Author Name:-Sri Adi Shankaracharya
Purport
Sri Adi Shankaracharya
8.26 Ete, these two; gati, courses; jagatah, of the world; which are sukla-krsne, white and black [The Northern Path (the path of the Gods), and the Southern Path (the Path of the Manes) respectively.]-white because it is a revealer of Knowlege, and black because there is absence of that (revelation); are hi, verily; mate, considered; sasvate, eternal, because the world is eternal. These two courses are possible for those who are qualified for Knowledge and for rites and duties; not for everybody. This being so, ekaya, by the one, by the white one; yati, a man goes; anavrttim, to the State of Non-return; anyaya, by the other; avartate, he returns; punah, again.