(Śrī Īśopaniṣad)
The knowledge that brings one nearer to the Supreme Personality of Godhead, Kṛṣṇa
andhaṁ tamaḥ praviśanti ye ’vidyām upāsate tato bhūya iva te tamo ya u vidyāyāḿ ratāḥ
ISO -Mantra 9