Thirukkural 454

மனத்து ளதுபோலக் காட்டி ஒருவற்கு இனத்துள தாகும் அறிவு.

Manaththu lathu pōla k kātti oruvatku Inaththul thāhum aritvu.

Display your inner thoughts plainly to one, and you become wise in their eyes. Show yourself true, and understanding follows.