Thirukkural 414

கற்றில னாயினுங் கேட்க அஃதொருவற்கு ஒற்கத்தின் ஊற்றாந் துணை.

Kaṟṟilanāyiṉum kēṭka aṃdoruvaṟku Oṟkattīn ūṟṟān tuṇai.

Even if you are unlearned, listen well: for a man, hearing is the spring from which memory flows.