The Compendium of Caraka 4.3.18

4.3.18

na cātmā satsvindriyeṣu jñaḥ, asatsu vā bhavatyajñaḥ; na hyasattvaḥ kadācidātmā, sattvaviśeṣāccopalabhyate jñānaviśeṣa iti//

Nor does the self become a knower when the senses are present, or an ignoramus when they are absent; for the self is never without a mind, and from the particular quality of the mind, a particular quality of knowledge is perceived.