A class on Sri Isopanisad Mantras 9-10 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on May 14, 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.
Sri Isopanisad Mantra 10
anyad evāhur vidyayā-
nyad āhur avidyayā
iti śuśruma dhīrāṇāṁ
ye nas tad vicacakṣire
The wise have explained that one result is derived from the culture of knowledge and that a different result is obtained from the culture of nescience.