A few days ago, I was saddened to learn that the husband of one of my camera club friends had passed away. I contacted my friend to express my condolences and I mentioned the time he had patiently sat for me to make a portrait.
Her response was to remind me that I had provided them with a "thank you" print of that portrait. She said it was a treasured photograph which was still on display in their house, and she had used that image in the booklet used at her husband's service.
I was quite overwhelmed. What a complement that my image was chosen to remind family and friends of the nature of that man. What an honour.
It's also a reminder of the value of photographs. We never know the future value of any image we make. They are worth preserving.