Kural - 995

Contempt is evil though in sport They who man's nature know,
E'en in their wrath, a courteous mind will show

Explanation
Reproach is painful to one even in sport; those (therefore) who know the nature of others exhibit (pleasing) qualities even when they are hated.

Tamil Transliteration
Nakaiyullum Innaa Thikazhchchi Pakaiyullum
Panpula Paatarivaar Maattu.