When something of an affliction happens to you, you either let it defeat you, or you defeat it.
Or you learn to work around the obstacle, if it is an incurable disease like M.S. that is ongoing and causes systematically more disability.
It is important to take an attitude of adapting and thriving in spite of the disease.
Leave the cure to the scientists and manage your life with the attitude that you can deal with the problems created by the disease.
You will probably need to give up some activities,like the balance beam (LOL) and other athletic pursuits that require balance, strength or require being on your feet for too long.
Focus on what you can still do and not on what you have lost.