Kural - 635

The man who virtue knows, has use of wise and pleasant words
With plans for every season apt, in counsel aid affords

Explanation
He is the best helper (of the king) who understanding the duties, of the latter, is by his special learning, able to tender the fullest advice, and at all times conversant with the best method (of.

Tamil Transliteration
Aranarindhu Aandramaindha Sollaanenj Gnaandrun
Thiranarindhaan Therchchith Thunai.