Nyāya Sūtras 149.5

149.5

kim atra jñeyaṃ pratyātmavedanīyatvāt samānam---ayaṃ khalv āvaraṇam anupalambhamānaḥ pratyātmam eva saṃvedayate nāvaraṇam upalabha iti, yathā kuḍyenāvṛtasyāvaraṇam upalabhamānaḥ pratyātmam eva saṃvedayate/ seyam āvaraṇopalabdhivad āvaraṇānupalabdhir api saṃvedyaiveti/ evaṃ ca saty apahṛtaviṣayam uttaravākyam astīti//16//

What is there to know about this, since it is equally self-experienced by each person? Indeed, this person, when not apprehending an obstruction, experiences directly within himself: 'I do not apprehend an obstruction,' just as one who apprehends an obstruction of something covered by a wall experiences directly within himself. Thus, just like the apprehension of obstruction, this non-apprehension of obstruction is also directly experienced. And this being so, the rejoinder is devoid of subject matter. ||16