If I were a Negro, I'd be fighting, as Martin Luther King fought, for human recognition and justice. I'd rather go down with my flag flying. If you're weak or crippled, or you can't speak out or fight back in some way, then people don't hesitate to treat you badly.
The biggest way I stay motivated is to run with a group of friends. Sometimes it's hard to get going by yourself, but if you have a plan and a meeting time, you know this run will happen for sure. It's a way to have fun - while also getting in a workout. Plus it distracts from pain, helps you fight fatigue, and gives you that extra push.