Chapter 8, Verse 26
Part of 8: Akṣhar Brahma Yog — अक्षरब्रह्मयोगशुक्लकृष्णे गती ह्येते जगतः शाश्वते मते। एकया यात्यनावृत्तिमन्ययाऽऽवर्तते पुनः॥
śhukla-kṛiṣhṇe gatī hyete jagataḥ śhāśhvate mate ekayā yātyanāvṛittim anyayāvartate punaḥ
The bright and dark paths of the world are thought to be eternal; one leads to no return, and the other leads to return.
The bright path is the path to the gods taken by the devotees. The dark path is of the manes taken by those who perform sacrifices or charitable acts with the expectation of rewards. These two paths are not open to the whole world. The bright path is open to the devotees and the dark one to those who are devoted to the rituals. These paths are as eternal as the Samsara. World here means devotees or people devoted to ritual. Pitriloka or Chandraloka is Svarga or heaven.