One can read the bible all day and never get faith. One can quote the scripture for a healing all day long and never get any results. The answer is simple. It includes healing by His stripes and forgiveness for our sins through the cross. Healing is just one side of the coin of being saved.
Forgiveness of sins is the other.
Jesus forgave the paralytic. Then He also healed Him to prove that He had the authority and power to do both. Faith is in the hearing of an anointed word. Faith cannot come just by speaking scriptures. Let us deal with the condition of the sinner before someone is saved.