“Then he touched their eyes and said, ‘According to your faith will it be done to you.’ “
Sometimes when we pray for healing during sickness, a well-meaning friend will say, “Well, you haven’t been healed because you didn’t have enough faith.” But Jesus did not heal everyone according to their faith.
The boy in Nain he brought back to life (Luke 7:14-15) did not have any faith at all. The girl in Capernaum he brought back to life (Luke 8:51-56) did not have any faith at all. When Jesus turned water into wine at the wedding feast in Cana (John 2:1-9) the hosts did not have any faith at all.
This is encouraging, because often we pray for the healing of non-religious friends. It would be futile to ask God to bring them back to health if it depended on their faith all the time. But he is not a God of futility. He is a God of hope.