Bhagavad Gita Chapter 14, Verse 10

रजस्तमश्चाभिभूय सत्त्वं भवति भारत | रजः सत्त्वं तमश्चैव तमः सत्त्वं रजस्तथा ||

rajas tamaś cābhibhūya sattvaṁ bhavati bhārata rajaḥ sattvaṁ tamaś caiva tamaḥ sattvaṁ rajas tathā

O Arjuna, sometimes sattva prevails over rajas and tamas, sometimes rajas overcomes sattva and tamas, and at other times tamas dominates sattva and rajas.

Krishna explains how the three gunas compete for dominance: 'Rajas tamaś cābhibhūya sattvaṁ bhavati'—sometimes sattva prevails (bhavati) over rajas and tamas. 'Rajaḥ sattvaṁ tamaś caiva'—sometimes rajas overcomes sattva and tamas. 'Tamaḥ sattvaṁ rajas tathā'—at other times tamas dominates sattva and rajas. This is crucial: the three gunas are constantly competing within you. They're not static—they rise and fall, each trying to dominate. Sometimes goodness is strong, sometimes passion takes over, sometimes ignorance prevails. Understanding this helps you see why your thoughts, feelings, and actions change constantly. You're not just one thing—you're a battlefield where these three forces compete. The key is recognizing which guna is dominant at any moment and learning to observe them without being completely controlled by them.