Bhagavad Gita Chapter 2, Verse 68

तस्माद्यस्य महाबाहो निगृहीतानि सर्वशः । इन्द्रियाणीन्द्रियार्थेभ्यस्तस्य प्रज्ञा प्रतिष्ठिता ॥

tasmād yasya mahā-bāho nigṛhītāni sarvaśaḥ | indriyāṇīndriyārthebhyas tasya prajñā pratiṣṭhitā ||

Therefore, O mighty-armed, one whose senses are completely withdrawn from sense objects—that person's wisdom is steadily established.

After showing how wandering senses destroy wisdom (2.67), Krishna offers the solution. 'Yasya nigṛhītāni sarvaśaḥ indriyāṇi'—whose senses are completely withdrawn. But nigṛhīta doesn't mean suppressing senses or avoiding life. Your eyes see, ears hear, but they don't hijack your mind. 'Tasya prajñā pratiṣṭhitā'—that person's wisdom stays steady. This is the sthita-prajña (2.54) in action. How? Through rāga-dveṣa-viyukta (2.64): when free from attachment and aversion, sense objects lose their power to pull you around. You engage fully with life, but your mind isn't enslaved to every stimulus.