In his book Living Life on Purpose, Greg Anderson shares the story of one man's journey to joy:
… his wife had left him and he was completely depressed. He had lost faith in himself, in other people, in God–he found no joy in living.
One rainy morning this man went to a small neighborhood restaurant for breakfast. Although several people were at the diner, no one was speaking to anyone else.  Our miserable friend hunched over the counter, stirring his coffee with a spoon.
In one of the small booths along the window was a young mother with a little girl. They had just been served their food when the little girl broke the sad silence by almost shouting, “Momma, why don't we say our prayers here?”

