Kural - 1011

To shrink abashed from evil deed is 'generous shame';
Other is that of bright-browed one of virtuous fame

Explanation
True modesty is the fear of (evil) deeds; all other modesty is (simply) the bashfulness of virtuous maids.

Tamil Transliteration
Karumaththaal Naanudhal Naanun Thirunudhal
Nallavar Naanup Pira.