There's nothing worse than not being able to walk.
Well, maybe there is something worse. Not being able to see would be pretty lousy, and not being able to talk would really put a cramp in my style. But in all of my fifty years, the times I've felt the most depressed were the times I couldn't go for a walk.
So, on when I'm feeling down and hopeless, I need to remember, at least I can walk now. And some day, when I can no longer walk, I will still be able to swim, or draw, or sew, or read, or talk, or SOMETHING.
It's always a good time to count your blessings.