BBC NEWS WRITES: "You matter to me. In a way I cannot explain, you matter to me. And you, you are a marvel... you and all the parts of you." It's not the kind of thing you normally write to a complete stranger.
But after graduating from college and moving to New York City, Hannah Brencher was feeling anxious and depressed. She found herself not wanting to be around other people and "just really unravelling".Then she started writing love letters to strangers and leaving them all over the city. The first letter she left on a train simply addressed: "If you find this letter then it's for you."