Some are a little bizarre:
Others are funny, thoughtful, and even pathetic:
Frank Warren's "community art project" began when he asked strangers to write a secret they had never told anyone on a postcard, and then mail the card anonymously to him. Some cards are scribbled on card paper. Others are carefully constructed artworks.
Each of the more than 10,000 postcards he has received (so far) reveals a secret that someone, somewhere, has guarded from the rest of the world.
Here is intriguing insight into the lives of people. Read it...and think.