My mom was a saint. She taught me to be terminally nice.
I can be almost terminally grief-stricken because things are so dire but at the same time there's a real lightheartedness about just the recoverability of life of how things change how they're not the same ever again.
Apart from the fact that your physical ability starts to decline I also think someone in their fifties being childlike becomes a little sad. You've got to be careful.