“A man can smile and smile and be a villain.”

“One may smile, and smile, and be a villain.”

“Many undoubtedly owe their good fortune to the circumstance that they possess a pleasing smile with which they win hearts. Yet these hearts would do better to beware and to learn from Hamlet's tables that one may smile, and smile, and be a villain.”

“I had to smile at the man. I mean, you have to smile at idiots and children.”

“The devil can cite Scripture for his purpose.
An evil soul producing holy witness
Is like a villain with a smiling cheek,
A goodly apple rotten at the heart.
O, what a goodly outside falsehood hath!”

“There is a smile of love,
And there is a smile of deceit,
And there is a smile of smiles
In which these two smiles meet.”

“Man, false man, smiling, destructive man!”

“Give a smile to everyone you meet (smile with your eyes) — and you’ll smile and receive smiles…”

“Sometimes your joy is the source of your smile, but sometimes your smile can be the source of your joy.”

“Withhold a smile only when the smile can hurt someone. Otherwise, let it bloom forth in a riot.”