In his book, Disappointment with God, writer Philip Yancey relates a touching story from his own life. One time on a visit to his mother--who had been widowed years earlier, in the month of Philip's first birthday--they spent the afternoon together looking through a box of old photos. A certain picture of him as an eight-month-old baby caught his eye. Tattered and bent, it looked too banged up to be worth keeping, so he asked her why, with so many other better pictures of him at the same age, she had kept this one.

Yancey writes, "My mother explained to me that she had kept the photo as a memento, because during my father's illn…