For me? The fact that life always changes.

A lot of times, I really really hate change. When I have a good thing going, the possibility of change makes me really anxious and sometimes depressed.

But when I'm in a bad spot? It's really really fucking hard, but I know eventually it will change. Will it change for the better or change for the worse? You can't know, but there's at least a chance that your situation will change some day, and there is a chance it will get better. It has got me going through some really very incredibly dark times where I really wanted to end my life. I still struggle with that now and then, but it's always good to have the thought of chance in the back of your mind.