Kural - 137

'Tis source of dignity when 'true decorum' is preserved;
Who break 'decorum's' rules endure e'en censures undeserved

Explanation
From propriety of conduct men obtain greatness; from impropriety comes insufferable disgrace.

Tamil Transliteration
Ozhukkaththin Eydhuvar Menmai Izhukkaththin
Eydhuvar Eydhaap Pazhi.