like that must take enormous courage. is that the sort of courage you think you could muster some day, to get out there and open yourself up to that? >> what i love about glenn and his wife, they are taking it one day at a time. that's really all we can do. they stay focused on what is possible. when you say glenn take that -- because our emotional dna is so tied to music, he is most comfortable, i would assume, there performing. that goes way back into the deepest depths of his memory and his core and that takes over. you know, i saw the same thing with my mom when she had sing songs from her girlhood. it's really beautiful. >> shep: an inspiration to care givers. the book is "take your oxygen first" and it makes a lot of sense. thank you so much. >> thank you. my pleasure. >> shep: alzheimer's can be difficult to discuss. it can be embarrassing and shocking and abrupt.