yas tvaci tiṣṭhaṃs tvaco 'ntaro yaṃ tvaṅ na veda yasya tvak śarīraṃ yas tvacam antaro yamayaty eṣa ta ātmāntaryāmy amṛtaḥ ||
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21. 'He who dwells in the skin, and within the skin, whom the skin does not know, whose body the skin is, and who pulls (rules) the skin within, he is thy Self, the puller (ruler) within, the immortal.'