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The unwavering firmness by which, through Yoga, the functions of the mind, the life-force and the senses are restrained that firmness, O Arjuna, is Sattvic (pure).

The unwavering steadiness by which, through yoga, one holds the workings of the mind, the breath and the senses, son of Pritha, is sattvic.

Krishna now describes steadiness (dhṛti). Sattvic steadiness is unwavering, and through yoga it holds together the activities of the mind, the vital breath (prāṇa) and the senses. This is the power of sustained self-mastery, which keeps a person on course without being pulled away by impulses. The phrase through yoga links this firmness to disciplined practice. It is the kind of resolve Arjuna will need to carry out his duty without wavering.