kadācit syād apītyevaṃ na bhūyastatra vastuni / utprekṣamāṇaiḥ sthātavyaṃ nātmakāmaiḥ pramātṛbhiḥ
When a certain sublation is possible [for a cognition], and on being sought for is not found, then regarding that object, investigators who desire their own welfare should not persist in imagining [that] "it might appear at some time."