It's so curious: one can resist tears and 'behave' very well in the hardest hours of grief. But then someone makes you a friendly sign behind a window, or one notices that a flower that was in bud only yesterday has suddenly blossomed, or a letter slips from a drawer... and everything collapses.
Nobody has ever taken a photograph of something they want to forget. We can build a wall of happy Kodak moments around ourselves, a wall of our Christmases, birthdays, baby showers and weddings, but we can never forget that celluloid film is see-through, that behind it, all the misery of real life waits for our wall to collapse someday.