A smile is often the most essential thing. One is repaid by a smile. One is rewarded by a smile. One is animated by a smile.
A smile costs less than electricity, but gives much light.
Youth smiles without any reason. It is one of its chiefest charms.
Joy's smile is much closer to tears than laughter.
Wrinkles should merely indicate where smiles have been.
It is boorish to live ungraciously: the giving is the hardest part what does it cost to add a smile?
One may smile, and smile, be a villain.