"Your faith has made you well" - Jesus says a version of this more than half of the times he performed a healing miracle. No matter how you interpret this statement, we have a responsibility in the healing process.
This is a challenging and difficult truth, but he said it. What should we do with this statement?
The short answer is to put all of your trust and expectation in who he is and his willingness to heal you because he is always willing to heal you.
Faith is not what you do to get something from God, faith is your heart's response to who he is. Faith is your receptivity to his will, which is always healing.
When people weren't healed or couldn't perform a miracle, he cited a lack of faith. When people were healed, he acknowledged their faith as a factor.
No matter how we look at these challenging truths, we must be willing to humble ourselves and do the work to enter the rest. The work is to believe, and apparently, according to Jesus, our capacity to believe is something we have control over.