Healing the sick is the afterthought. He wanted to do so much more but He could only heal a few sickos. What "Mighty Work" would He do if we truly believed. So often we just want Him to give us comfort when we're suffering. We don't even know that we're settling for crumbs.
"And he could do no mighty work there, except that he laid his hands on a few sick people and healed them and he marveled because of their unbelief." Mark 6:5,6