Kural - 275

'Our souls are free,' who say, yet practise evil secretly,
'What folly have we wrought!' by many shames o'er-whelmed, shall cry

Explanation
The false conduct of those who say they have renounced all desire will one day bring them sorrows that will make them cry out, "Oh! what have we done, what have we done.".

Tamil Transliteration
Patratrem Enpaar Patitrozhukkam Etretrendru
Edham Palavun Tharum.