Bhagavad Gita · Chapter 5: Renunciation in Action
Bhagavad Gita 5.8
naiva kiṃcitkaromīti yukto manyeta tattvavit | paśyan śṛṇvanspṛśañjighrannaśnangacchansvapan śvasan ||
The disciplined person who knows the truth should think, "I do nothing at all," while seeing, hearing, touching, smelling, eating, walking, sleeping, and breathing,
Modern context
The verse gives a practice for the whole day. While seeing, hearing, touching, smelling, eating, walking, sleeping and breathing, the person who knows the truth holds the thought 'I am not the doer of any of this'. Most of these things do in fact happen by themselves. We do not decide to digest or to breathe. The practice extends that recognition to everything the body does, and it loosens the constant sense of 'I am doing, I am managing' that makes ordinary life so tiring.