Bhagavad Gita Chapter 10, Verse 15

स्वयमेवात्मनात्मानं वेत्थ त्वं पुरुषोत्तम | भूतभावन भूतेश देवदेव जगत्पते ||

svayam evātmanātmānaṁ vettha tvaṁ puruṣottama bhūta-bhāvana bhūteśa deva-deva jagat-pate

Indeed, You alone know Yourself by Your own internal potency, O Supreme Person, origin of all beings, Lord of all beings, God of gods, Lord of the universe!

Arjuna acknowledges that only Krishna knows Himself. 'Svayam evātmanātmānaṁ vettha'—indeed, You alone know Yourself by Your own internal potency. Krishna knows Himself through His own divine power—not through external means, but through His own nature. 'Puruṣottama'—O Supreme Person. 'Bhūta-bhāvana'—origin of all beings. 'Bhūteśa'—Lord of all beings. 'Deva-deva'—God of gods. 'Jagat-pate'—Lord of the universe. Arjuna acknowledges Krishna with multiple epithets, recognizing His supreme position. This verse emphasizes that Krishna's self-knowledge is complete and comes from within—He doesn't need external validation or understanding. He knows Himself perfectly through His own nature.