Kaṭha Upaniṣad 6.1.4-2.p8

6.1.4-2.p8

yathā ādarśe - darpaṇe, pratīyamānaṃ vastu sākṣāt dṛṣṭavastuvat pratyaṅmukhatvādikalpitārthānavaruddhatayā na upalabhyate; tathā iha ātmaviṣayiṇī pratītiḥ ityarthaḥ | lokāntarespi tathā ityāha - yathā svapne tathā pitṛloke | yathā svapnadarśanasya jāgraddarśanavat samyaktayā saṃśayādivirodhitayā punaḥ anusandhānayogyatvābhāvaḥ, tathā pitṛloka ityarthaḥ | yathā apsu parīva dadṛśe tathā gandharvaloke | yathā jalāntaḥ stha vastunaḥ na itaravat spaṣṭaprakāśaḥ tadvat paridadṛśa iva | na vastutaḥ parito dṛśyata ityarthaḥ | gandharvalokespi āpātataḥ pratītimātram ityarthaḥ | chāyātapayoriva brahmaloke - yathā chāyātapayoḥ miśraṇe śuddhātapavartipadārthavat na upalambhaḥ; evaṃ brahmalokespi na samyak upalambhaḥ | ato duradhigamam ātmatattvamiti bhāvaḥ |