"We smile in the faces of some people while our hearts curse them."

"Smiles are the foundation of beauty."

"Smiles form the channels of a future tear."

"Cervantes smiled Spain's chivalry away; A single laugh demolished the right arm Of his own country;—seldom since that…"

"But owned that smile, if oft observed and near, Waned in its mirth, and wither'd to a sneer."

"From thy own smile I snatched the snake."

"If you smile at me I will understand, cause that is something everybody everywhere does in the same language."

"In came Mrs. Fezziwig, one vast substantial smile."

"In the meantime, it just makes it a little harder to smile. But so does the world."

"What's the use of worrying? It never was worth while, so Pack up your troubles in your old kit-bag, And smile, smile,…"