And he [Jesus] said unto her, Daughter, thy faith hath made thee whole; go in peace, and be whole of thy plague.
(Mark 5:34)
I encourage you to go through the four Gospels carefully and underline with a red pencil all the individual cases of healing. Or better yet, you could write them all down on a sheet of paper.

Some examples are the woman with the issue of blood, Jairus' daughter, the centurion who came on behalf of his servant, and the two blind men who followed Jesus. You'll find that there are 19 specific cases of healing mentioned.

You might think that there are a lot more, but Matthew, Mark, and Luke often recorded the same incident. For instance, Matthew, Mark, and Luke all recorded the healing of the woman with the issue of blood, but it was only one incident. They were all talking about the same thing.

After reading through the Gospels and writing down each incident of healing, you'll find that twelve out of the nineteen incidents speak of the faith of the individual. For instance, in Mark 5:34, Jesus said to the woman with the issue of blood, "Thy faith has made thee whole. Go in peace and be whole of thy plague."

Whose faith made her whole? It was her faith.

Confession
Since the people Jesus ministered to on the earth used their faith to receive healing, then I can use my faith to receive healing. And faith comes by hearing the Word of God. I attend to God's Word, and keep it before my eyes and my ears.
Source: Health Food Devotions by Kenneth E. Hagin.
Excerpt permission granted by Faith Library Publications