Kural - 707

Than speaking countenance hath aught more prescient skill?
Rejoice or burn with rage, 'tis the first herald still

Explanation
Is there anything so full of knowledge as the face ? (No) it precedes the mind, whether (the latter is) pleased or vexed.

Tamil Transliteration
Mukaththin Mudhukkuraindhadhu Unto Uvappinum
Kaayinum Thaanmun Thurum.