The idea of prosthetics is a tool. Most people's cell phones are prosthetics. If you leave your cell phone at home, you feel impacted by not having it. It's an important part of your daily function and what you can do in a day.
At some point in every person's life, you will need an assisted medical device - whether it's your glasses, your contacts, or as you age and you have a hip replacement or a knee replacement or a pacemaker. The prosthetic generation is all around us.
I think that everyone has something about themselves that they feel is their weakness... their 'disability.' And I'm certain we all have one, because I think of a disability as being anything which undermines our belief and confidence in our own abilities.
If we want to discover the full potential in our humanity, we need to celebrate those heartbreaking strengths and those glorious disabilities we all have. It is our humanity and all the potential within it that makes us beautiful.