kāryakāraṇatāvyāpyavyāpakatvavirodhitāḥ / dṛśyatve sati siddhyanti yaścātmā saviśeṣaṇaḥ //
Effect and cause, pervaded and pervader, and contrariness—all these, as well as the qualified nature [of a thing], are established only when [the thing] is perceptible.