Nyāya Sūtras 3.6

3.6

ātmani tāvan nāstīti, anātmani ātmeti duḥkhe sukham iti anitye nityam ity atrāṇe trāṇam iti,

first, regarding the self, that 'it does not exist'; regarding the non-self, that 'it is the self'; regarding pain, that 'it is pleasure'; regarding the impermanent, that 'it is permanent'; regarding that which is without protection, that 'it is protection';