Kural - 121

Control of self does man conduct to bliss th' immortals share;
Indulgence leads to deepest night, and leaves him there

Explanation
Self-control will place (a man) among the Gods; the want of it will drive (him) into the thickest darkness (of hell).

Tamil Transliteration
Atakkam Amararul Uykkum Atangaamai
Aarirul Uyththu Vitum.