One metaphor I used to describe my depression was being stuck at the bottom of a hill on a rollercoaster with too much friction. I could push and push and push

One metaphor I used to describe my depression was being stuck at the bottom of a hill on a rollercoaster with too much friction. I could push and push and push my way to the top of one hill, but I'd just come to a halt again at the bottom of the next hill. Not only did it take a lot more effort than usual to get moving on things, the effort I did put in did not result in any long-term momentum, making it really difficult to find motivation to keep trying.