If you are wise, smile. :)

"Laugh: a smile that bursts." - John E. Donovan

"The key to being popular is to keep a smile on your face." Abigail Van Buren

"Smiles are richer wealth than tears." - Anon

"One may smile, and smile, and be a villain." - William Shakespeare

"It's difficult but rewarding....To smile when others are complaining." - William Arthur Ward

"To smile at the enemy is to disarm him." - The Mother

"Keep smiling. It makes everyone wonder what you are up to." - Unknown

"If we do meet again, why, we shall smile! If not, why then, this parting was well made." - William Shakespeare

"A smile says many things. It says you're happy. You're confident. You're feeling secure." - T.W. McKnight & R.H. Phillips

"The mere possibility of employing laughter as a weapon shows that it involves the idea of power." - Harald Hoffding

"A guilty conscience needs no accuser." - English Proverb (smile here)