Kural - 575

Benignity is eyes' adorning grace;
Without it eyes are wounds disfiguring face

Explanation
Kind looks are the ornaments of the eyes; without these they will be considered (by the wise) to be merely two sores.

Tamil Transliteration
Kannirku Anikalam Kannottam Aqdhindrel
Punnendru Unarap Patum.