SB 4.31.29
vidura uvaca
so ’yam adya maha-yogin
bhavata karunatmana
darsitas tamasah paro
yatrakiñcana-go harih
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Sri 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.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
This material world is called tamah, 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.