Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 29


विदुर उवाचसोऽयमद्य महायोगिन् भवता करुणात्मना ।दर्शितस्तमस: पारो यत्राकिञ्चनगो हरि: ॥ २९ ॥


vidura uvācaso ’yam adya mahā-yoginbhavatā karuṇātmanādarśitas tamasaḥ pāroyatrākiñcana-go hariḥ


Śrī Vidura said: O great mystic, O greatest of all devotees, by your causeless mercy I have been shown the path of liberation from this world of darkness. By following this path, a person liberated from the material world can return home, back to Godhead.


This material world is called tamaḥ, dark, and the spiritual world is called light. The Vedas enjoin that everyone should try to get out of the darkness and go to the kingdom of light. Information of that kingdom of light can be attained through the mercy of a self-realized soul. One also has to get rid of all material desires. As soon as one frees himself from material desires and associates with a liberated person, the path back home, back to Godhead, is clear.