A smile is a curve that sets everything straight.
--Phyllis Diller   

A smile is an inexpensive way to improve your looks. 

--Charles Gordy 

A smile is a facelift that's in everyone's price range! 
--Tom Wilson  

A smile is happiness you'll find right under your nose. 
--Tom Wilson  

A smile is the light in your window that tells others that there is a caring, sharing person inside. 
--Denis Waitley   

Smile, it's free therapy. 
---Douglas Horton