AITAREYA UPANISHAD · 1.3.11

स ईक्षत कथं न्विदं मदृते स्यादिति स ईक्षत कतरेण प्रपद्या इति । स ईक्षत यदि वाचाभिव्याहृतं यदि प्राणेनाभिप्राणितं यदि चक्षुषा दृष्टं यदि श्रोत्रेण श्रुतं यदि त्वचा स्पृष्टं यदि मनसा ध्यातं यद्यपानेनाभ्यपानितं यदि शिश्नेन विसृष्टमथ कोऽहमिति ॥ ११ ॥

sa īkṣata kathaṃ nvidaṃ madṛte syāditi sa īkṣata katareṇa prapadyā iti । sa īkṣata yadi vācābhivyāhṛtaṃ yadi prāṇenābhiprāṇitaṃ yadi cakṣuṣā dṛṣṭaṃ yadi śrotreṇa śrutaṃ yadi tvacā spṛṣṭaṃ yadi manasā dhyātaṃ yadyapānenābhyapānitaṃ yadi śiśnena visṛṣṭamatha ko’hamiti ॥ 11 ॥

The Spirit thought, “Without Me how should all this be?” and He thought, “By what way shall I enter in?” He thought also, “If utterance is by Speech, if breathing is by the Breath, if sight is by the Eye, if hearing is by the Ear, if thought is by the Mind, if the lower workings are by Apana, if emission is by the organ, who then am I?”

Sri Aurobindo · CWSA 18, p. 201