Maitri (Maitrāyaṇīya) Upaniṣad 3.1

3.1

te hocurbhagavanyadyevamasyātmano mahimānaṃ sūcayasītyanyo vā paraḥ ko'yamātmā sitāsitaiḥ karmaphalairabhibhūyamānaḥ sadasadyonimāpadyata ityavācīṃ vordhvāṃ vā gataṃ dvandvairabhibhūyamānaḥ paribhramatīti katama eṣa iti tānhovāca ||

1. Then they said: "Sir, if thus you describe the greatness of this Soul (Ātman), there is still another, different one. Who is he, called soul (ātman), who, being overcome by the bright or the dark fruits of action (karman), enters a good or an evil womb, so that his course is downward or upward and he wanders around, overcome by the pairs of opposites (dvan-dva)?"