By studying Bhagavad-gītā, one can become a soul completely surrendered to the Supreme Lord and engage himself in pure devotional service. As the Lord takes charge, one becomes completely free from all kinds of materialistic endeavors.
~ A.c. Bhaktivedanta Swami Prabhupāda
To become free from sinful life, there is only simple method: if you surrender to Kṛṣṇa. That is the beginning of bhakti.
The perfection of yoga, therefore, does not terminate in voidness or impersonalism; on the contrary, the perfection of yoga is attained when one actually sees the Personality of Godhead in His eternal form.