I don’t know how literally you meant the “visibly”, but people are often good at covering up how they feel inside. My mood is more stable these days so it’s a bit hard to recall the details anymore, but I would find it very plausible that a well-slept night could at some point have made the difference between “feeling basically good and happy” and “feeling like life is not worth living” for me.
But you probably wouldn’t have been able to tell that from the outside. Probably to an outside observer, it would have looked more like “Kaj looks like he’s in a good mood today” vs. “Kaj looks a little reserved today”.
I don’t know how literally you meant the “visibly”, but people are often good at covering up how they feel inside. My mood is more stable these days so it’s a bit hard to recall the details anymore, but I would find it very plausible that a well-slept night could at some point have made the difference between “feeling basically good and happy” and “feeling like life is not worth living” for me.
But you probably wouldn’t have been able to tell that from the outside. Probably to an outside observer, it would have looked more like “Kaj looks like he’s in a good mood today” vs. “Kaj looks a little reserved today”.