Today was a good day. Dad was able to respond to the PT, when my mom visited the rehab place the PT guy was all "Let's show her what you can do!" and he shot up out of his wheelchair and marched around the room, before tiring quickly. So that made her day. And of course we're all like "Well, y'know, he may be grumpy and incommunicative tomorrow..." and she's all yeah yeah. But we take the good days and enjoy them, for there may not be many more. Or there may be. You just don't know.
Enjoy the moment if it's a good moment, friends. The good moments demand the savor.