A man and a woman, who had never met before, found themselves assigned to the same sleeping room on a transcontinental train. Though initially embarrassed and uneasy over sharing a room, the two were tired and fell asleep quickly, he in the upper bunk and she in the lower.

Smile, it is the key that fits the lock of everybody's heart.

A smile happens in a flash, but its memory can last a lifetime

There are hundreds of languages in the world, but a smile speaks them all

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

A warm smile is the universal language of kindness