A clinical psychologist who works with Alzheimer's patients and their families was sharing a story that bears repeating:
A woman was having a very difficult time coming to grips with the fact that her husband of many years was going to eventually forget who she was due to his Alzheimer's. Although the doctor tried to encourage her to look for her husband's love in a multiple of ways, she insisted on quizzing him every time she visited him. She would ask, "Do you know who I am?" For a while, he was able to answer, but eventually, the disease had set in.
She asked "Do you know who I am?", her husband answered, "No, but I know I love you."
There are some things that are stronger than our frail knowledge.