BG 3.40

3.40 इन्द्रियाणि the senses? मनः the mind? बुद्धिः the intellect? अस्य its? अधिष्ठानम् seat? उच्यते is called? एतैः by these? विमोहयति deludes? एषः this? ज्ञानम् wisdom? आवृत्य having enveloped? देहिनम् the embodied.Commentary If the abode of the enemy is known it is ite easy to kill him. So Lord Krishna like a wise army general points out to Arjuna the abode of desire so that he may be able to attack it and kill it ite readily.

— vedicscriptures · exposition · source ↗

The enemy has captured different strategic positions in the body of the conditioned soul, and therefore Lord Kṛṣṇa is giving hints of those places, so that one who wants to conquer the enemy may know where he can be found. Mind is the center of all the activities of the senses, and thus when we hear about sense objects the mind generally becomes a reservoir of all ideas of sense gratification; and, as a result, the mind and the senses become the repositories of lust. Next, the intelligence department becomes the capital of such lustful propensities. Intelligence is the immediate next-door neighbor of the spirit soul. Lusty intelligence influences the spirit soul to acquire the false ego and identify itself with matter, and thus with the mind and senses. The spirit soul becomes addicted to enjoying the material senses and mistakes this as true happiness. This false identification of the spirit soul is very nicely explained in the Śrīmad-Bhāgavatam (10.84.13) : yasyātma-buddhiḥ kuṇape tri-dhātuke sva-dhīḥ kalatrādiṣu bhauma ijya-dhīḥ yat-tīrtha-buddhiḥ salile na karhicij janeṣv abhijñeṣu sa eva go-kharaḥ “A human being who identifies this body made of three elements with his self, who considers the by-products of the body to be his kinsmen, who considers the land of birth worshipable, and who goes to the place of pilgrimage simply to take a bath rather than meet men of transcendental knowledge there is to be considered like an ass or a cow.”

— vedicscriptures · exposition · source ↗