प्रयत्नाद्यतमानस्तु योगी संशुद्धकिल्बिषः। अनेकजन्मसंसिद्धस्ततो याति परां गतिम् ॥

prayatnād yatamānas tu yogī sanśhuddha-kilbiṣhaḥ aneka-janma-sansiddhas tato yāti parāṁ gatim

But the Yogî, labouring with assiduity, purified from sin, fully perfected through manifold births, he reacheth the supreme goal.

In plain words: Krishna says the yogi who keeps working hard and is cleansed of wrongdoing becomes fully perfect over many lifetimes. In the end, they reach the highest goal.