Isha Upanishad 53

53

vidyāṃ cāvidyāṃ ca yas tad vedobhayaṃ saha |
avidyayā mṛtyuṃ tīrtvā vidyayāmṛtam aśnute ||

Anyat eva, a really different (thing); is produced as a result; Vidyayā, by vidyā (worship or meditation)—(this) āhuḥ, they say, because of the Vedic texts: "The world of gods is (won) through meditation" (Bṛ. I. v. 16); "They ascend there through meditation". Āhuḥ, they say; anyat avidyayā by avidyā, karma (rites), a different (result) is produced, because of the Vedic text: "The world of the Manes (is won) through karma" (Bṛ. I. v. 16). Iti, thus; śuśruma, we have heard; dhīrāṇām, (the teaching) of the wise men, those teachers, who vicacakṣire, explained to us; tat, that—karma and meditation. The purport is that this is their knowledge traditionally received.