"Your faith has made you whole" "Go and sin no more" "If you believe, it will be done for you"(double check this one)
Jesus did not ask Peter's mother-in-law how much faith she had before he healed her, Mark 1:29-31, nor the crowds that came for healing after that, Mark 1:32-34. Jairus and his wife laughed at Jesus when he said that their daughter was asleep, Mark 5:40, but Jesus still raised her to life again. In Mark 8:31-37 Jesus met a deaf and mute man - and faith is not even mentioned. In Mark 9 when Jesus met the father of the boy with the unclean spirit, he said "IF you can, take pity on us." He later said, "I do believe,
help me in my unbelief". The man at the pool of Betheda, in John 5, did not even answer when Jesus asked him if he wanted to be well, but repeated the superstition that a person would only be healed if they went into the pool after an angel had stirred the water, John 5:7. Yet Jesus still healed him.
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"Yahuweh Does Will To Do So (wants to heal you)" ..... all true in Scripture and as Yahuweh Reveals Today also.....
God does want to heal, and he does heal today.
But it's not for us to demand that he do it immediately, when we ask him for it. The salvation, and health, of our souls is far more important than our temporary bodies.
So the gift of faith , as well as abiding in union with the Son and with the Father,
and simply Yahuweh's Choice,
may heal anyone.
I don't believe it depends on OUR faith.
I know of at least 2 people who were trusting in God and grew to have a much closer relationship with God, yet still had cancer/were in wheelchairs.
I don't believe it's a matter of God's choice either - that would mean that it was all random; that God said to people "I will heal her but not him", based purely on a whim.
May be different each time, or 'the same' (outwardly) at times.....
May be a work of faith.
As I said, some have been healed without faith - yet some lovely, Spirit filled Christians, who have had faith and asked God - have not received physical healing.