Chandogya Upanishad (with commentary) · Chapter 7.11

ChUpBh_7,10.2 phalaṃ-sa yo 'po brahmetyupāsta āpnoti sarvānkāmānkāmyānmūrtimato viṣayānityarthaḥ /
apsaṃbhavatvācca tṛpterambupāsanāttṛptimāṃśca bhavati /
samānamanyat //2//
iti cchāndogyopaniṣadi saptamādhyāyasya daśamaḥ khaṇḍaḥ
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START ChUp 7,11.1
tejo vāvādbhyo bhūyaḥ |
tad vā etad vāyum āgṛhyākāśam abhitapati tadāhur niśocati nitapati varṣiṣyati vā iti |
teja eva tatpūrvaṃ darśayitvāthāpaḥ sṛjate |
tad etad ūrdhvābhiś ca tiraścībhiś ca vidyudbhir āhrādāś caranti tasmād āhur vidyotate stanayati varṣiṣyati vā iti |
teja eva tatpūrvaṃ darśayitvāthāpaḥ sṛjate |
teja upāssveti

ChUpBh_7,11.1 tejo vāvādbhyo bhūyaḥ /
tejaso 'pakāraṇatvāt /
kathamapkāraṇatvamityāha /
yasmādabyonistejastasmāttadvā etattejo vāyumāgṛhyāvaṣṭabhya svātmanā niścalīkṛtya vāyumākāśamabhitapatyākāśamabhivyāpnuvattapati yadā tadā'hurlaukikā niśocati saṃtapati sāmānyena jagannitapati dehānato varṣiṣyati vā iti /
prasiddhaṃ hi loke kāraṇamabhyudyataṃ dṛṣṭavataḥ kārya bhaviṣyatīti vijñānam /
teja eva tatpūrvamātmānamudbhūtaṃ darśayitvāthānantaramapaḥ sṛjate 'to 'psraṣṭṛtvādbhūnyo 'dbhyastejaḥ /
kiñcānyattadetatteja eva stanayitnurūpeṇa varṣaheturbhavati /
katham /
ūrdhvābhiścordhvagābhirvidyudbhistiraścībhiśca tiryaggatābhiśca sahā'hrādāḥ stananaśabdāścaranti /
tasmāttaddarśanādāhurlaukikā vidyotate stanayati varṣiṣyati vā ityādyuktārtham /
atasteja upāḥsveti //1 //
START ChUp 7,11.2
sa yas tejo brahmety upāste |
tejasvī vai sa tejasvato lokān bhāsvato 'pahatatamaskān abhisidhyati |
yāvat tejaso gataṃ tatrāsya yathākāmacāro bhavati yas tejo brahmety upāste |
asti bhagavas tejaso bhūya iti |
tejaso vāva bhūyo 'stīti |
tan me bhagavān bravītv iti