Today, give a stranger one of your smiles. It might be the only sunshine he sees all day.
~Quoted in P.S. I Love You, compiled by H. Jackson Brown, Jr.
It takes seventeen muscles to smile and forty-three to frown.
Of all the things you wear, your expression is the most important.
A laugh is a smile that bursts.
~Mary H. Waldrip
Smile: If you can't raise the corners of your mouth, at least let the middle droop.
A smile is a curve that sets everything straight.