Kaṭha Upaniṣad 218

218

yatpratijñātaṃ guhyaṃ brahma pravakṣyāmīti tadāha -- ya eṣa supteṣu prāṇādiṣu jāgartiṃ na svapiti / katham / kāmaṃ kāmaṃ taṃ tam abhipretaṃ stryādyartham avidyayā nirmimāṇo
niṣpādayañjāgartiṃ puruṣo yaḥ, tad eva śukraṃ śubhraṃ śuddhaṃ tad brahma nānyad guhyaṃ brahmāsti / tad evāmṛtam avināśy ucyate sarvaśāstreṣu / kiñ ca pṛthivyādayo lokās tasminn eva sarve brahmaṇi śritā āśritāḥ sarvalokakāraṇatvāt tasya / tad u nātyeti kaścanety ādi pūrvavad eva ///2,2.8 //

Shankara’s Commentary:
Com.—What was pledged in ‘I will explain the secret Brahman’ is now explained. This Purusha who wakes, i.e., does not sleep, when all, i.e., when prana and the rest are asleep, creating by ignorance whatever was desired, i.e., objects of perception, such as woman and the rest, is certainly pure; and that is the Brahman. There is no other secret Brahman. It is that alone which is said to be immortal, i.e., deathless in all the sastras. Moreover, the worlds, earth and the rest, all depend on the Brahman, that being the cause of all worlds. None passeth beyond that, etc., as already explained.

8. This Purusha who wakes when all sleep, creating what was desired is certainly ‘the pure,’ that is Brahman and that is said to be immortal. All worlds are fastened on that; none passes beyond that. This verily is that.