Bhagavad Gita Chapter 3 Verse 41
भगवद् गीता अध्याय 3 श्लोक 41

तस्मात्त्वमिन्द्रियाण्यादौ नियम्य भरतर्षभ।
पाप्मानं प्रजहि ह्येनं ज्ञानविज्ञाननाशनम्।।3.41।।



हिंदी अनुवाद - स्वामी रामसुख दास जी ( भगवद् गीता 3.41)
।।3.41।।इसलिये हे भरतवंशियोंमें श्रेष्ठ अर्जुन तू सबसे पहले इन्द्रियोंको वशमें करके इस ज्ञान और विज्ञानका नाश करनेवाले महान् पापी कामको अवश्य ही बलपूर्वक मार डाल।


English Translation of Sanskrit Commentary By Sri Shankaracharya's
3.41 Since this is so, therefore, O scion of the Bharata dynasty, adau niyamya, after first controlling; indriyani, the organs; prajahihi, renounce; enam, this one, the enemy under consideration; which is papmanam, sinful-which is desire that is accustomed to sinning; and jnana-vijnana-nasanam, a destroyer of learning and wisdom, jnana, learning, means knowledge about the Self etc. from the scripures and a teacher. Vijnana, wisdom, means the full experience of that.
Renounce, i.e. discard, from yourself the destroyer of those two-learning and wisdom, which are the means to the achievement Liberation.
It has been said, After first controlling the organs, renounce desire the enemy. As to that, by taking the support of what should one give up desire? This is being answered:


English Translation of Commentary  - Dr. S. Sankaranarayan
3.41 Or the passage jnana-vijnana-nasana may be an adverb  [modifying the verb must avoid]  meaning  by destroying  it i.e.,  by keeping it  off by means of knowledge  (thought)  i.e.,  by means of the mind and by means of superior  knowledge  (superior thought)  i.e.,  by means of the intellect.  The intention is this :  One must not allow,  in the fancy,  [the wrath]  risen in the sense-organs, and must not make any resolve about  [the foe], fancied.			
  The logic in this regard (in the above means) [ the Lords ] explains in a couple of verses:


English Translation of Ramanuja's Sanskrit Commentary
3.41 For whatever reason a person engaged in Jnana Yoga, which is of the nature of abandoning the activities of all the senses, should control this enemy in the shape of desire which turns him away from the self through creating infatuation for objects of the senses - for the same reason, you, who are yoked to the activities of the senses by reason of being in conjunction with the Prakrti, should, in the beginning itself, i.e., at the very beginning of the practice of the means for release, control the senses by the practice of Karma Yoga, which provides for the regulation of the working of the senses. And then you must destroy, i.e., slay this sinful enemy, which is in the shape of desire and which destroys knowledge and discrimination, i.e., knowledge relating to the nature of the self and of the discriminative power, which is the means to gain this knowledge.

Sri Krsna speaks of that which is most important among the adversaries:


Transliteration Bhagavad Gita 3.41Tasmaat twam indriyaanyaadau niyamya bharatarshabha;
Paapmaanam prajahi hyenam jnaana vijnaana naashanam.


Word Meanings Bhagavad Gita 3.41tasmāt—therefore; tvam—you; indriyāṇi—senses; ādau—in the very beginning; niyamya—having controlled; bharata-ṛiṣhabha—Arjun, the best of the Bharatas; pāpmānam—the sinful; prajahi—slay; hi—certainly; enam—this; jñāna—knowledge; vijñāna—realization; nāśhanam—the destroyer