“What sunshine is to flowers, smiles are to humanity. These are but trifles, to be sure; but scattered along life’s pathway, the good they do is inconceivable.”
― Joseph Addison
“Autumn, the year’s last, loveliest smile.” -William Cullen Bryant
Sometimes your joy is the source of your smile, but sometimes your smile can be the source of your joy. -Thich Nhat Hanh
Think about this one.
“Life is like a mirror. Smile at it and it smiles back at you.”
“A smile is an inexpensive way to change your looks.” — Charles Gordy http://www.great-inspirational-quotes.com/smile-and-laughter-quotes.html