Kural - 423

Though things diverse from divers sages' lips we learn,
'Tis wisdom's part in each the true thing to discern

Explanation
To discern the truth in every thing, by whomsoever spoken, is wisdom.

Tamil Transliteration
Epporul Yaaryaarvaaik Ketpinum Apporul
Meypporul Kaanpa Tharivu.