Learning implies change. To live implies change. Change is the only constant. Therefore, instead of fighting it, we should embrace it.
What experiences have you had with change?
I'll start:
As I've become more politically aware, I've become less and less willing to do hard work. I now do only what is asked of me, and no more. It started as a response to the inherent exploitation we are forced to participate, but it creeped into my own personal life. I have become "lazy", as I've become less and less engaged in my own personal projects. And while I tend to antagonize this part of myself, I've recently learned to be compassionate. I'm now slowly realizing how much I overworked myself, and how toxic my relationship to work was. I'm slowly enjoying life a bit more every day, and even though I feel like I'm going "slower", I no longer think that's necessarily a bad thing. It's ok to smell the roses sometimes.
There is still a sour feeling in me of how much more I would be willing to do if the result of such work benefited society directly. But I can't just will a different economic system into existence, so I need to learn to let go. We need to pick and choose our battles.
You misunderstand. You don't have to know disease to have health. However, the term "health" implies by its definition the existence of "non-health", or "disease". It's a contrast. If that were not the case, if disease didn't exist anywhere, then you wouldn't even know what "healthy" meant, because that would imply the existence of non health which wouldn't exist.
So if you want to be healthy, you must accept that some unhealthiness exists somewhere, otherwise you wouldn't know if you were healthy or not. The same way for light to exist, darkness must exist as well. You wouldn't know what a melody was without the spaces between the notes.
I'm not saying wishing to be happy is bad, btw. However, do realize you wouldn't know what happiness was if that was all you ever experienced. So being unhappy is not all bad. It will pass. The same way happiness will eventually come and pass. Don't let these roadbumps and fluctuations of emotions stand in the way of your goals, is what I'm saying.