Nyāya Sūtras 397.2

397.2

phalānantaraṃ duḥkham uddiṣṭam, uktaṃ ca ``bādhanālakṣaṇaṃ duḥkham''iti/ tat kim idaṃ pratyātmavedanīyasya sarvajantupratyakṣasya sukhasya pratyākhyānam, āhosvid anyaḥ kalpa iti?
anya ity āha/ katham? na vai sarvalokasākṣikaṃ sukhaṃ śakyaṃ pratyākhyātum/ ayaṃ tu janmamaraṇaprabandhānubhavanimittād duḥkhān nirviṇṇasya duḥkhaṃ jihāsato duḥkhasaṃjñābhāvanopadeśo duḥkhahānārtha iti/

Immediately after fruit, pain was enunciated, and it was said: “Pain is defined by affliction.” Then is this a rejection of pleasure, which is experienced by oneself and is perceived by all living beings, or is there another alternative?
He replies: It is another alternative. How? Pleasure, to which all people are witnesses, cannot indeed be rejected. But this is the instruction to cultivate the concept of pain for one who is despondent from the pain caused by the experience of the continuous succession of birth and death, and who wishes to abandon pain, for the purpose of abandoning pain.