KAIVALYA UPANISHAD · 20

अणोरणीयानहमेव तद्वन्महानहं विश्वमहं विचित्रम् ।
पुरातनोऽहं पुरुषोऽहमीशो हिरण्मयोऽहं शिवरूपमस्मि ॥ २०॥

aṇoraṇīyānahameva tadvanmahānahaṃ viśvamahaṃ vicitram ।
purātano’haṃ puruṣo’hamīśo hiraṇmayo’haṃ śivarūpamasmi ॥ 20॥

I am the atom of atoms; so am I the biggest (of all). I am this diversified universe. I am the oldest of all. I am Purusha. I am Īśa (the Lord). I am of the form of Jyotis (light) and of the form of happiness.

K. Narayanasvami Aiyar · Thirty Minor Upanishads (1914), pp. 31–33