The Compendium of Caraka 1.8.15

1.8.15

tadarthātiyogāyogamithyāyogāt samanaskamindriyaṃ vikṛtimāpadyamānaṃ yathāsvaṃ buddhyupaghātāya saṃpadyate sāmarthyayogāt punaḥ prakṛtimāpadyamānaṃ yathāsvaṃ buddhimāpyāyayati //

From excessive application, non-application, or improper application to those objects, the sense faculty, accompanied by the mind, undergoes affliction, leading respectively to the impairment of cognition; on the other hand, from appropriate application, it returns to its normal state and enriches its respective cognition.