Motivation from a 7 year old

I am the proud Grandfather of a beautiful 7 year old grand daughter and a precious 3 year old grand son. Since she was 3 my grand daughter has spent a week every summer with my wife and youngest son and I. We only see Zoe about 3 or 4 times a year because they live in Indianapollis and we live in Illinois. Due to the fact that we see so little of each other my son was not aware of how bad my health had slipped.
My weight had gone up to 486 pounds, I was on oxygen all the time and was pretty much confined to 3 downstairs rooms in my house, and my van once I could get to it to drive. About this same time my youngest son moved out and it was just my wife and I and she is disabled. I decided a few weeks before school let out to drive out there on a Saturday and see the kids and make arrangements for Zoe to come for her week in June.
I wasn't feeling well when i left and by the time I got there I was in a full blown episode of congestive heart failure. My son and his family were terrified and tried to get me to let them take me to a hospital, I wouldn't go but could not sleep because I couldn't lie down and was having trouble breathing. My son sat up with me all night and at first light he helped me to my van and I made the 5 hour drive home where my medicine and oxygen were.
The call that broke my heart came the next day when my son called to say that given my health and my wifes disability he could not send Zoe out this summer. He also told me he was scared to death that I would not live to see the end of summer. That was June 12th the day my journey started, I called my son and asked him for a deal. If by October I could show him proof that I was on the road to recovery and could taek care of her, would he let zoe take a couple extra days off school at fall break and come to stay. He said we would see how it went, I started by putting myself on a strict 1200 calory a day diet. Due to my health there wasn't much I could do for exercise but I stumbled around my house with my walker and lifted soup cans and did anything I could.
By the time October came I was down 80 lbs and was starting to move better and exercise more, my son was amazed and agreed that Zoe could come and we had a great time. She told me over and over how proud she was of me. Well in January I joined the local YMCA and started lifting weights and swimming daily, today I weighed in at 348 lbs. with my goal being 240 by Spring of 2012. I talk to Zoe weekly and give her updates on my progress and she continues to tell me how proud she is. We are already planning this summers visit and since I am doing so well my son has agreed to let my Grandson come to. You can bet I will continue to work as hard as I possibly can to be in my best shape when the kids get here in June.