Happiness can be fleeting. It can feel unsustainable too. Why and when are they happy? When they are pursuing a hobby, eating, having sex? Can they only do the things they enjoy in life? No. They may not even be able to achieve a balance where even the majority of the time, they get to do those things. So- their reality may be that happiness is so elusive, it's not all together worth it.
It's complicated too. Do too much of the things we enjoy and, that too can become boring. Excessive food will make you fat. So- you get punished sometimes- if you happen to indulge too much in something.
Or, the great highs make the lows even worse. I'm almost afraid to be happy now because, I don't believe it would/ could last. I'd almost prefer to be on a more melancholy but even keel- rather than have great highs and lows. Not that I think I'm bipolar but- I am capable of still feeling happy.
But truly- the rare occassions it happens. Even if it's just hope I feel- I get a simultaneous terror that I'm setting myself up for a fall- again.
Not that I answered that question with the more half and half response. I'd say I'm mostly sad.
I suppose conversely- I'd tend to question whether it's possible to feel sad the entire time. Are there truly no periods at all, a person isn't simply more neutral? Sadness I tend to see as a more strong emotion. Sometimes we have to concentrate too. Are they deeply sad when they are placing an order for something say? Seems more likely in that moment- their thoughts were on getting it right.