Definition.com
The Smile (n.) , when given to him who's robbed us, steals something from the thief.
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The Smile (n.) is not always kind — there's daggers in men's smiles
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The Smile (n.) is a cure for the wounding of a frown.
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The Smile (n.) does not rule out villainy: one may smile, and smile, and be a villain.
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The Smile (n.) is ever worn by welcome, while farewell goes out sighing.