Kural - 1094

I look on her: her eyes are on the ground the while:
I look away: she looks on me with timid smile

Explanation
When I look, she looks down; when I do not, she looks and smiles gently.

Tamil Transliteration
Yaannokkum Kaalai Nilannokkum Nokkaakkaal
Thaannokki Mella Nakum.