"Do you wish to get well?"
When we are sick for many months or years, we can fall into the snare of focusing on our weaknesses instead of our strengths. And this, at times, can lead to being overly dependent on others. And as it was for this man, Jesus knew He had to challenge him out of this way of thinking.
God will teach us to stop feeling sorry for ourselves and take responsibility for our lives, doing so correctly, being productive as an asset, no longer a liability.