Sanskrit
अहं वैश्वानरो भूत्वा प्राणिनां देहमाश्रितः । प्राणापानसमायुक्तः पचाम्यन्नं चतुर्विधम् ॥
ahaṃ vaiśvānaro bhūtvā prāṇināṃ deham āśritaḥ prāṇāpānasamāyuktaḥ pacāmy annaṃ caturvidham
Translation
I, having become the Fire of Life, take possession of the bodies of breathing things, and united with the life-breaths, I digest the four kinds of food.
Annie Besant · The Bhagavad-Gita, translated by Annie Besant (4th ed., 1922) — Wikisource · Public Domain
Explanation
The immanence theme turns physiological here: Krishna identifies with Vaishvanara, the fire common to all beings, and specifically with the digestive fire that processes the four traditional categories of food, aided by the paired life-breaths prana and apana. Read as biology it is a strange verse to modern ears, but read as this chapter’s larger argument it fits precisely — having claimed cosmic immanence in light and plant growth, the text pushes immanence all the way down into the most mundane, involuntary bodily process there is, leaving no gap between “spiritual” and “physical” for the reader to hide in.