Sometimes when you have nothing else to motivate you to pick yourself up and keep going, the urge to prove everyone wrong can be that little bit that keeps you holding on. Just to prove a point, you get out of bed and put on the boots, time to face another day leading with your jaw. No matter how bad it gets, remember the doubters and the people who have said you couldn't do it. Keep going just to piss them off, if for no other reason.
Living well is the best revenge, remember that.