I wasn't aware of this until now. Williams was London Ed's teacher. I battle the former via the latter.
It came as news to me that Williams spent most of his life in a wheelchair. It testifies to the possibilities of the human spirit that great adversity for some is no impediment to achievement. I think also of Stephen Hawking, Charles Krauthammer, and FDR.
So stop whining and be grateful for what you have. You could be in a bloody wheelchair!