I think a lot about what and how other people think. As far as I can tell, reality is the construction of the external world via other people's ideas, in the most meaningful sense. Not to cast aspersions on an objective material reality that's going to do its thing, no matter what any of us think. That is clearly a thing, but, it isn't a meaningful thing. Meaning is all the nonsense humanity comes up with.
To cast it aside entirely would be nihilism. I can't find a solid argument against that per se, but I'd instead point out that it's just unrealistic. It assumes we're capable of being purely logical, and that's not at all the case. Rather, we form all these values and interpretations, not from pure logic, or cold hard objectivity, but from living our entire lives navigating the swirling chaotic sea of everyone else's ideas.
They say Major Depression effects about 5% of the population. That means 95% of you can't understand why I'd need to exercise every day, just to get a step closer to being a functional human being. Never mind that much of that 5% doesn't really want to hear about exercise, either. Many would prefer to hear it's just an illness they should take meds for. Major Depression itself being a problematic concept in that it's more of a symptom than any particular illness. A symptom of any number of things, sometimes easier to discern than others. In my case, hypopituitarism probably has a lot to do with it.
In recent years, I've been getting better at developing strategies for coping and even overcoming it, and yet, even as they're working, I feel like they're not. I stop doing them. I sink back into depression and don't understand why. I find myself wondering how others could possibly sympathize, when they need no such strategies just to be functional human beings.
It does get difficult to keep plugging away, never getting ahead of depression enough to feel it's worth all the trouble. Strung along by this notion that at some point, life is supposed to be rewarding, but never quite getting there. I try really hard. At what, I'm not sure.