Kural - 266

Who works of 'penance' do, their end attain,
Others in passion's net enshared, toil but in vain

Explanation
Those discharge their duty who perform austerities; all others accomplish their own destruction, through the entanglement of the desire (of riches and sensual pleasure).

Tamil Transliteration
Thavanj Cheyvaar Thangarumanj Cheyvaarmar Rallaar
Avanjeyvaar Aasaiyut Pattu.