A class on Sri Isopanisad Mantra 9 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on May 13, 1970 in Los Angeles, CA.
Sri Isopanisad Mantra 9
andhaṁ tamaḥ praviśanti
ye 'vidyām upāsate
tato bhūya iva te tamo
ya u vidyāyām ratāḥ
Those who engage in the culture of nescient activities shall enter into the darkest region of ignorance. Worse still are those engaged in the culture of so-called knowledge.