I’ve had the fortune/misfortune of having some rather painful, long-term illnesses (6 months – 2 years). I’ve recovered from both instances. However, it does make you appreciate your health!
Having a fairly functional body is something not many appreciate until they lose it. Life is still possible, and things enjoyable, but it certainly puts many barriers in the way. Everything becomes an effort.
Having lost it and regained it, I can pretty safely say that my health is my most prized possession.