Vaisesika Sūtra 2.2.18

दृष्टं च दृष्टवत् ॥१८॥

dr̥ṣṭaṁ ca dr̥ṣṭavat ॥18॥

[दृष्टं (dṛṣṭaṁ): Seen or experienced; च (ca): And; दृष्टवत् (dṛṣṭavat): Like one who has seen]

By seeing or experiencing, the ability to experience (comes into being).