AITAREYA UPANISHAD · 1.3.13

स जातो भूतान्यभिव्यैख्यत् किमिहान्यं वावदिषदिति । स एतमेव पुरुषं ब्रह्म ततममपश्यत् । इदमदर्शमिती३ ॥ १३ ॥

sa jāto bhūtānyabhivyaikhyat kimihānyaṃ vāvadiṣaditi । sa etameva puruṣaṃ brahma tatamamapaśyat । idamadarśamitī3 ॥ 13 ॥

Now when He was born, He thought and spoke only of Nature and her creations; in this world of matter of what else should He speak or reason? Thereafter He beheld that Being who is the Brahman and the last Essence. He said, “Yea, this is He; verily, I have beheld Him.”

Sri Aurobindo · CWSA 18, p. 202