Shree Krishna continues the comparative evaluation between karm yog (the practice of spirituality while performing worldly duties) and karm sanyas (the practice of spirituality in a renounced state) in this chapter. He reiterates that karm yog is a more practicable path than karm sanyas. When work is done with devotion, it purifies the mind and enhances the spiritual realization. The mind then becomes tranquil, and meditation becomes the primary means of elevation.
The yogis strive to conquer the mind through meditation because, while a trained mind is the best friend, an untrained mind can be the worst enemy for a spiritual aspirant. Shree Krishna cautions Arjun that by merely engaging in severe austerities, one cannot progress on the spiritual path. Therefore, moderation must be maintained, even in basic necessities like food, sleep, work, recreation, etc.
Shree Krishna then explains yog sādhanā or the spiritual practice for uniting the mind with God. He says, similar to a lamp that does not flicker in a windless place: a sādhak should practice keeping his mind steady in meditation. He agrees that it is difficult to restrain the mind, but it can be controlled by practice and detachment. Therefore, whenever it wanders away, one needs to bring it back and continue to focus on God. Then the mind gets purified and is established in transcendence or samādhi, which is a joyous state where one experiences infinite divine bliss.
Arjun asks what happens to those spiritual aspirants who begin their journey, but due to an unsteady mind, they are unable to reach their goal. Shree Krishna reassures him that those who strive for God-realization are able to overcome evil. God keeps an account of all our accumulated spiritual merits from past lives and reawakens their wisdom in future births. In this way, they can continue their journey from where they had left off. And with the help of their accrued merits from previous lives, in their present life, the yogis fast track towards God.
The Lord then concludes this chapter with a declaration that the yogi (who strives to unite with God) is superior to the tapasvī (ascetic), the jñānī (person of learning), and the karmī (ritualistic performer). And highest among all the yogis is the one who engages in bhakti (loving devotion of God).