Kural - 301

Where thou hast power thy angry will to work, thy wrath restrain;
Where power is none, what matter if thou check or give it rein

Explanation
He restrains his anger who restrains it when it can injure; when it cannot injure, what does it matter whether he restrain it, or not ?.

Tamil Transliteration
Sellitaththuk Kaappaan Sinangaappaan Allitaththuk
Kaakkinen Kaavaakkaal En?.