रजस्तमश्चाभिभूय सत्त्वं भवति भारत।
रजः सत्त्वं तमश्चैव तमः सत्त्वं रजस्तथा।।14.10।।
14.10 O scion of the Bharata dynasty, sattva increases by subduing rajas and tamas, rajas by overpowering sattva and tamas, and tamas by dominating over sattva and rajas.
14.10 Even though all the three Gunas of Sattva etc., are associated with the nature of the self conjoined with Prakrti in the form of body, yet owing to the dominance of previous Karmas and the differences in the food nourishing the body, Sattva etc., preponderate or are subdued by turn. Sometimes Sattva preponderates prevailing over Rajas and Tamas; sometimes Rajas preponderates prevailing over Tamas and Sattva, and sometimes Tamas preponderates prevailing over Rajas and Sattva. He teaches that this changing preponderance of the Gunas can be inferred from the knowledge of the effects produced by them.
Rajastamashchaabhibhooya sattwam bhavati bhaarata; Rajah sattwam tamashchaiva tamah sattwam rajastathaa.
rajaḥ—mode of passion; tamaḥ—mode of ignorance; cha—and; abhibhūya—prevails; sattvam—mode of goodness; bhavati—becomes; bhārata—Arjun, the son of Bharat; rajaḥ—mode of passion; sattvam—mode of goodness; tamaḥ—mode of ignorance; cha—and; eva—indeed; tamaḥ—mode of ignorance; sattvam—mode of goodness; rajaḥ—mode of passion; tathā—also