|Chapter 16: The Divine And Demoniac Natures|
etair vimuktah kaunteya
tamo-dvarais tribhir narah
acaraty atmanah sreyas
tato yati param gatim
The man who has escaped these three gates of hell, O son of Kunti, performs acts conducive to self-realization and thus gradually attains the supreme destination.
Krishna now glorifies the result of avoiding the "three gates to hell." By following the rules and regulations for the four orders (varnas) and the four statuses (ashrama), one is able to regulate the senses and avoid the entrapment of these base qualities. By cultivation of this Vedic knowledge, one rises to the level of spiritual realization, and from this stage one can perform devotional service. For one who engages in devotional service, the supreme destination, the abode of Lord, is assured.
Please read the Sanskrit Verse and the Prabhupada's Purport.