Kural - 243

They in whose breast a 'gracious kindliness' resides,
See not the gruesome world, where darkness drear abides

Explanation
They will never enter the world of darkness and wretchedness whose minds are the abode of kindness.

Tamil Transliteration
Arulserndha Nenjinaark Killai Irulserndha
Innaa Ulakam Pukal.