Bhagavad Gita Chapter 2, Verse 41

व्यवसायात्मिका बुद्धिरेकेह कुरुनन्दन । बहुशाखा ह्यनन्ताश्च बुद्धयोऽव्यवसायिनाम् ॥

vyavasāyātmikā buddhir ekeha kuru-nandana | bahu-śākhā hy anantāś ca buddhayo'vyavasāyinām ||

One is the chief and certain Rule for him who seeks to reach that Realm—many the rules which branch from it for him whose Spirit wavers!

Krishna contrasts two intellects: vyavasāyātmikā buddhi (resolute) and avyavasāyinām buddhi (irresolute). The determined person has single-pointed focus—their intellect unified toward liberation through dharma. The wavering mind branches endlessly across desires, fears, and distractions. This isn't about being narrow-minded; it's about having one clear center that organizes everything else. Without this unified direction, your mind dissipates energy in infinite directions, achieving little.