Kural - 123

If versed in wisdom's lore by virtue's law you self restrain
Your self-repression known will yield you glory's gain

Explanation
Knowing that self-control is knowledge, if a man should control himself, in the prescribed course, such self-control will bring him distinction among the wise.

Tamil Transliteration
Serivarindhu Seermai Payakkum Arivarindhu
Aatrin Atangap Perin.