Bhagavad Gita Chapter 4, Verse 19

यस्य सर्वे समारम्भाः कामसङ्कल्पवर्जिताः | ज्ञानाग्निदग्धकर्माणं तमाहुः पण्डितं बुधाः ||

yasya sarve samārambhāḥ kāma-saṅkalpa-varjitāḥ jñānāgni-dagdha-karmāṇaṁ tam āhuḥ paṇḍitaṁ budhāḥ

One whose all undertakings are free from desire and will, whose actions are burnt by the fire of knowledge—him the wise call a learned person.

Krishna describes the wise person in detail. 'Kāma-saṅkalpa-varjitāḥ' (free from desire and will) means actions aren't driven by personal desires or egoic will. 'Jñānāgni-dagdha-karmāṇam' (actions burnt by fire of knowledge) means the results of action are consumed by understanding—knowledge destroys the binding power of karma. The wise person ('paṇḍitam') acts without being bound because desire and attachment are absent. This verse explains HOW one becomes 'buddhimān' (wise) from verse 4.18: by acting without kāma (desire) and saṅkalpa (egoic will). The 'fire of knowledge' (jñānāgni) transforms action—not eliminating it, but freeing it from bondage. This is the practical application of understanding action vs. inaction.