We like dandelions when they are young, when their bright yellow flowers dot the meadow. But when they are old they seem unlike themselves, they lose their attractiveness and we say they have "gone to seed". Nearing death they wear crowns of white seeds, crowns that prove that they have not become less than they were but more, a multitude.
Watching an older person lose their memory makes it easy to say that they "are not themselves". But they are not not themselves. That which makes them who they are has not changed. God within them has not changed. And they are closer to Heaven, which is Reality itself, and will be restored to a reality much greater than their best day on earth.