Bhagavad Gita: Attain the supreme goal [Dhyana-yoga,Text 45 Chapter 6]

sri-bhagavan uvaca

prayatnad yatamanas tu
yogi samsuddha-kilbisah
aneka-janma-samsiddhas
tato yati param gatim

(Dhyana-yoga, Text 45 Chapter 6)

Meaning:

And when the yogi 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.

Bhagavad Gita: Attain the supreme goal  [Dhyana-yoga,Text 45 Chapter 6]