Michael J. Fox said this quote

I have referred to it as a gift--something for which others with this affliction have taken me to task. I was only speaking from my own experience, of course, but I stand partially corrected: if it is a gift, it's the gift that just keeps on taking.Coping with relentless assault and the accumulating damage is not easy. Nobody would ever choose to have this visited upon them. Still, this unexpected crisis forced a fundamental life decision: adopt a siege mentality--or embark upon a journey. Whatever it was--courage? acceptance? wisdom?--that finally allowed me to go down the second road (after spending a few disastrous years on the first) was unquestionably a gift--and absent this neurophysiological catastrophe, I would never have opened it, or been so profoundly enriched. That's why I consider myself a lucky man.