Turn your face to the sun and the shadows fall behind you (Maori Proverb)

A face that never laughs betrays an evil heart (Basque Proverb)

The loveliest faces are to be seen by moonlight, when one sees half with the eye and half with the fancy.
(Iranian Proverb)

You cannot strike a face that is smiling (Korean Proverb)

Often a silent face has voice and words (Latin Proverb)