Kural - 1250

If I should keep in mind the man who utterly renounces me,
My soul must suffer further loss of dignity

Explanation
If I retain in my heart him who has left me without befriending me, I shall lose even the (inward) beauty that remains.

Tamil Transliteration
Thunnaath Thurandhaarai Nenjaththu Utaiyemaa
Innum Izhaththum Kavin.