Kural - 878

Know thou the way, then do thy part, thyself defend;
Thus shall the pride of those that hate thee have an end

Explanation
The joy of one's foes will be destroyed if one guards oneself by knowing the way (of acting) and securing assistance.

Tamil Transliteration
Vakaiyarindhu Tharseydhu Tharkaappa Maayum
Pakaivarkan Patta Serukku.