Bhagavad Gita As It Is

References to text BG 7.28
BG 7.28: Persons who have acted piously in previous lives and in this life and whose sinful actions are completely eradicated are freed from the dualities of delusion, and they engage themselves in My service with determination.

Text â„–
And when the yogī engages himself with sincere endeavor in making further progress, being washed of all contaminations, then ultimately, achieving perfection after many, many births of practice, he attains the supreme goal.
Dhyana-yoga
BG 6.45