This quote has often, in my opinion, been misinterpreted. I believe that he was trying to say that having good health means that there's much to live for and when coupled with the ability to leave the past in the past, it can propel us toward happiness. When we look around, so many people are living in the past and there is often a lot of sadness there.
How many times have you met someone and instead of telling you about their dreams and hopes, they would tell you about the things that have made them forget that they once had goals?
- "I was going to be a dancer, but broke my leg and had to stop dancing."
- "Yes, he is my only child, but I had three miscarriages and my daughter died when she was 8."
- "Yes, I'm single because I was left at the altar and have not trusted anyone since."