Bhagavad Gita Chapter 13, Verse 23

उपद्रष्टानुमन्ता च भर्ता भोक्ता महेश्वरः | परमात्मेति चाप्युक्तो देहेऽस्मिन्पुरुषः परः ||

upadraṣṭā anumantā ca bhartā bhoktā maheśvaraḥ paramātmety cāpy ukto dehe 'smin puruṣaḥ paraḥ

The Supreme Self in this body is called the witness, the permitter, the sustainer, the enjoyer, and the great Lord.

Krishna describes the Supreme Self (Paramatma) in the body. 'Upadraṣṭā'—the witness. The Supreme Self witnesses all actions. 'Anumantā'—the permitter. It allows actions to happen. 'Bhartā'—the sustainer. It sustains the body. 'Bhoktā'—the enjoyer. It experiences pleasure and pain. 'Maheśvaraḥ'—the great Lord. It's the master of all. 'Paramātmety cāpy ukto dehe 'smin puruṣaḥ paraḥ'—the Supreme Self in this body is called the supreme purusha. When you understand this, you recognize that the Supreme Self—the ultimate knower—is present in your body. It's the witness of all actions, the permitter of all actions, the sustainer of the body, the experiencer of all, and the great Lord. This is not the individual consciousness—it's the Supreme Consciousness present in the individual. Recognizing this Supreme Self in you is the path to liberation.