Charak Samhita
आत्मा ज्ञः करणैर्योगाज् ज्ञानं त्वस्य प्रवर्तते। करणानामवैमल्यादयोगाद्वा न वर्तते ॥५४॥
The Purusha is endowed with the power of perception. It perceives things when it is associated with the mind, intellect and sense faculties. If these instruments of perception are either absent (i.e., detached from the Purusha or not associated with it) or impeded, then there will be no perception.
english translation
AtmA jJaH karaNairyogAj jJAnaM tvasya pravartate। karaNAnAmavaimalyAdayogAdvA na vartate ॥54॥
hk transliteration by Sanscript