"And this is the confidence that we have in
him, that, if we ask any thing according to
his will, he heareth us:
And if we know that he hear us, whatsoever
we ask, we know that we have the petitions
that we desired of him."
1 John 5:14-15

We have to be confident that God is willing
to heal us; and that He hears us and gives
us the petition of healing that we desire.