Kural - 714

Before the bright ones shine as doth the light
Before the dull ones be as purest stucco white

Explanation
Ministers should be lights in the assembly of the enlightned, but assume the pure whiteness of mortar (ignorance) in that of fools.

Tamil Transliteration
Oliyaarmun Olliya Raadhal Veliyaarmun
Vaansudhai Vannam Kolal.